Answer:
The reduced atom is Br.
Explanation:
The oxidation-reduction reaction contains a reductant and an oxidant (oxidizing agent). The oxidation process is the process in which electrons are lost and produce positively charged ions. The reduction process is the process in which electrons is gained and negatively charge ions are produced. In the reaction of chlorine with calcium:2Na + Br₂ → 2NaBr,
Na loses 1 electrons and is oxidized to Na⁺. (Na → Na⁺ + e).
Br₂ gains 2 electrons and is reduced to 2Br⁻. (Br₂ + 2e → 2Br⁻).
So, the reduced atom is Br.
Brad and Matt are working in the lab. They noticed that when they mixed two dilute solutions together, the reaction between them happened very slowly. Which of Matt's suggestions would BEST help to increase the rate of this reaction?
Answer:
c.) increase the concentration of one of the solutions
Explanation:
why is boron and beryllium an exception to the octet rule
Answer:
Explanation:
Beryllium especially, but Boron as well both exhibit metallic characteristics.
The outside ring of Beryllium contains 2 electrons. It would have to take on 6 electrons to have a ring of 8. The same statement can be made about Boron (except that it would need 5 electrons to make 8). It is easier for the atom to give up 2 or 3 than than to take on 5 or 6. It would not be easy to have a 5 or 6 minus charge on it.
Boron and beryllium are exceptions to the octet rule because they have less than eight electrons in their valence shell in some compounds, such as BF₃ and BeH₂, due to their position in Group III and the unique properties of their electrons.
Boron and beryllium are exceptions to the octet rule because they do not always complete an octet of electrons in their compounds. Boron, found in compounds like BF₃, tends to form compounds with only six valence electrons around the boron atom, rather than the eight suggested by the octet rule. Beryllium, on the other hand, often ends up with only four valence electrons as seen in the molecule BeH₂. These deviations from the octet rule occur because of the elements' positions in Group III of the periodic table, where elements commonly have fewer valence electrons than required to fulfill the octet. Thus, compounds of these elements are less predictable from the octet rule, which was primarily based on observations of the elements in Groups IV through VIII.
Incomplete octets are found in some compounds involving boron, aluminum, and beryllium, such as boron hydrides. The behavior of these elements is based on their tendency to form stable structures with fewer than eight electrons; boron atoms, for example, might follow a 'sextet rule' in some compounds but can achieve full octets in others like in its complex with ammonia, NH₃BF₃. Likewise, beryllium typically forms molecular compounds wherein it forms single covalent bonds without reaching an octet, due to its limited number of valence electrons and its small atomic size.
What is the definition of work?
Answer:
activity involving mental or physical effort done in order to achieve a purpose or result.
Explanation:
The scientific definition of work is: using a force to move an object a distance .
A branch of chemistry concerned with the chemical effects of light
This is known as photochemistry
Identify which one is the reducing agent in this reaction
2 Na + S → Na2S
Show ALL work
Answer:
Na.
Explanation:
The oxidation-reduction reaction contains a reductant and an oxidant (oxidizing agent).An oxidizing agent, or oxidant, gains electrons and is reduced in a chemical reaction. Also known as the electron acceptor, the oxidizing agent is normally in one of its higher possible oxidation states because it will gain electrons and be reduced.A reducing agent (also called a reductant or reducer) is an element (such as calcium) or compound that loses (or "donates") an electron to another chemical species in a redox chemical reaction.For the reaction:2Na + S → Na₂S.
Na is oxidized to Na⁺ in (Na₂S) (loses 1 electron). "reducing agent".
S is reduced to S²⁻ in (Na₂S) (gains 2 electrons). "oxidizing agent".
A sample of lemon juice is found to have a pH of 2.3. What is the concentration of hydrogen ions in the lemon juice?
Answer: It's equal to 10^(-2.3), or 0.00501 M, or 5.01 * 10^-3 moles/Liter
Explanation:
Well, pH = - log[H+]
Or, in words, pH is equal to -1 multiplied by the logarithm (base 10) of the hydrogen ion concentration. So you have 2.3 = -log[H+]. We want to isolate the H+, so let's start simplifying the right hand side of the equation. First, we multiply both sides by -1. -2.3=log[H+] Now, the definition of a logarithm says that if the log (base 10) of [H+] is -2.3, then 10 raised to the -2.3 power is [H+] So on each side of the equation, we raise 10 to the power of that side of the equation. 10^(-2.3) = 10^(log[H+]) and because 10^log cancels out... 10^(-2.3) = [H+] Now we've solved for [H+], the hydrogen ion concentration!
A sample of lemon juice is found to have a pH of 2.3. 5.012×10−3 moles per liter is the concentration of hydrogen ions in the lemon juice.
What is pH ?The pH scale, which previously stood for "potential of hydrogen," is used to describe how acidic or basic an aqueous solution is. The pH values of acidic solutions are typically lower than those of basic or alkaline solutions.
The pH scale determines how acidic or basic water is. The range is 0 to 14, with 7 representing neutrality. A base is present when the pH is higher than 7. In reality, pH is a measurement of the proportion of free hydrogen and hydroxyl ions in water.
Lemon juice is 10,000–100,000 times more acidic than water, with a pH between 2 and 3. (1, 2, 3). The pH of food is a gauge of how acidic it is. Lemon juice is acidic because its pH ranges from 2 to 3.
pH = -log [ H+ ]
2.3 = -log [ H+ ]
-2.3 = log [ H+ ]
10^( -2.3 ) = 10^( log [ H+ ] )
10^(-2.3) = [ H+ ]
[ H+ ] = 5.012×10−3 moles per liter.
Thus, A sample of lemon juice is found to have a pH of 2.3. 5.012×10−3 moles per liter is the concentration of hydrogen ions in the lemon juice.
To learn more about pH follow the link;
https://brainly.com/question/491373
#SPJ5
Use lewis dot symbols to show the sharing of electrons between a nitrogen atom and fluorine atoms to form a molecule in which each atom has an octet of electrons.
Explanation:
Lewis dot structure is the representation of the valence electrons around the atom of an element. it also shows the number of unpaired electrons present in a molecule.
Nitrogen has atomic number of 7 and electronic configuration is given as:
[tex][N]=1s^22s^22p^3[/tex]
Fluorine has atomic number of 9 and electronic configuration is given as:
[tex][F]=1s^22s^22p^9[/tex]
Since fluorine is highly electronegative atom.will attract electrons of nitrogen towards itself.So in Lewis dot structure the fluorine atom will present around single nitrogen atom.
The Lewis structure is given in an image attached.
Using Lewis dot symbols, nitrogen forms three covalent bonds with fluorine atoms to create a molecule where each achieves an octet. Nitrogen shares its three unpaired electrons with each fluorine's unpaired electron, resulting in nitrogen trifluoride (NF3) with all atoms following the octet rule.
Explanation:Using Lewis dot symbols, we can visualize the sharing of electrons between a nitrogen atom and fluorine atoms to form a molecule where each atom achieves an octet of electrons. Nitrogen, being a Group 15 element, has five valence electrons: one lone pair and three unpaired electrons. The Lewis dot symbol for nitrogen is represented as 'N' with three dots surrounding it, each representing one unpaired valence electron and a pair of dots for the lone pair.
Fluorine is a Group 17 element and has seven valence electrons: three lone pairs and one unpaired electron. Its Lewis dot symbol is 'F' with three pairs of dots and one single dot.
To form a stable compound, nitrogen shares its three unpaired electrons with three fluorine atoms, each of which contributes an unpaired electron of its own. Consequently, nitrogen forms three single covalent bonds with three fluorine atoms. Each fluorine atom in the molecule will have three lone pairs of electrons in addition to the shared electron pair, satisfying the octet rule.
The resulting compound, nitrogen trifluoride (NF3), has a Lewis structure symbolized as:
:F:
|
N
|
:F:
With the nitrogen atom in the center sharing a pair of electrons with each of the three fluorine atoms and each fluorine atom having three lone pairs, all atoms satisfy the octet rule, with nitrogen having its octet by sharing three pairs of electrons and each fluorine by having three lone pairs and one shared pair.
Learn more about Lewis dot structures here:https://brainly.com/question/28652824
#SPJ6
A catalyst can speed up the rate of a given chemical reaction by
Decreasing the activation energy needed for the reaction.
Place the following solutions in order of increasing osmotic pressure. I. 0.15 M C2H6O2. II. 0.15 M MgCl2, III. 0.15 M NaCl, A. III < I < II B. II < III < I C. I < II < III D. I < III < II the answer is D but how do you know?
Answer:
D. I < III < II
Explanation:
The osmotic pressure (π) is given by the relation:π = iMRT.
where, π is the osmotic pressure.
i is van 't Hoff factor.
M is the molarity of the solution.
R is the general gas constant.
T is the temperature.
M, R and T are constant for all solutions.
So, the osmotic pressure depends on the van 't Hoff factor.
The van 't Hoff factor is the ratio between the actual concentration of particles produced when the substance is dissolved and the concentration of a substance as calculated from its mass. For most non-electrolytes dissolved in water, the van 't Hoff factor is essentially 1.For most ionic compounds dissolved in water, the van 't Hoff factor is equal to the number of discrete ions in a formula unit of the substance.
For C₂H₆O₂ (non-electrolyte solute): i = 1.
For MgCl₂: i = 3.
It dissociates to give (Mg²⁺ + 2Cl⁻).
For NaCl: i = 2.
It dissociates to give (Na⁺ + Cl⁻).
So, the solute that has the highest osmotic pressure is II. 0.15 M MgCl₂, then III. 0.15 M NaCl, then I. 0.15 M C₂H₆O₂.
So, the answer is:
D. I < III < II.
D. I < III < II
Further explanationGiven:
(I). 0.15 M C₂H₆O₂
(II) 0.15 M MgCl₂
(III) 0.15 M NaCl
Question:
Place the following solutions in order of increasing osmotic pressure assuming the complete dissociation of ionic compounds.
The Process:
The osmotic pressure of a nonelectrolyte solution is calculated as follows:
[tex]\boxed{ \ \pi = MRT \ }[/tex]
The osmotic pressure of an electrolyte solution is calculated as follows:
[tex]\boxed{ \ \pi = MRTi \ }[/tex]
The van't Hoff factor is i = 1 + (n - 1)α, with
n = number of ions, and α = degree of dissociation.In our problem, assuming the complete dissociation of ionic compounds results in α = 100% and i = n.
From the information above, each type of solution can be prepared as follows:
C₂H₆O₂ (ethylene glycol) is non-electrolyte solutions.MgCl₂ and NaCl are strong electrolyte solutions.[tex]\boxed{ \ MgCl_2 \rightarrow Mg^{2+} + 2Cl^- \ } \rightarrow \boxed{ \ i = n = 3 \ ions \ }[/tex][tex]\boxed{ \ NaCl \rightarrow Na^{+} + Cl^- \ } \rightarrow \boxed{ \ i = n = 2 \ ions \ }[/tex]Now we compare the amount of osmotic pressure from each solution.
0.15 M C₂H₆O₂ ⇒ [tex]\boxed{ \ \pi = 0.15 \times RT \ } \rightarrow \boxed{ \ \pi = 0.15RT \ }[/tex] in atm.0.15 M MgCl₂ ⇒ [tex]\boxed{ \ \pi = 0.15 \times RT \times 3 \ } \rightarrow \boxed{ \ \pi = 0.45RT \ }[/tex] in atm.0.15 M NaCl ⇒ [tex]\boxed{ \ \pi = 0.15 \times RT \times 2 \ } \rightarrow \boxed{ \ \pi = 0.30RT \ }[/tex] in atm.From the previous results, it can be observed that 0.15 M MgCl₂ delivers the most considerable osmotic pressure while 0.15 M C₂H₆O₂ has the smallest.
Thus, the rank of the solutions according to their respective osmotic pressures in increasing orders is 0.15 M C₂H₆O₂ < 0.15 M NaCl < 0.15 M MgCl₂.
- - - - - - - - - -
Notes:
Colligative properties are physical properties of a solution that depend on the amount of solute expressed as concentration. One of the colligative properties is osmotic pressure (π).Osmosis is a spontaneous process in which a solvent molecule passes through a semipermeable membrane from a dilute solution (lower solute concentration) to a more concentrated solution (higher solute concentration). The pressure that causes the osmosis process to stop is considered osmotic pressure. We can also observe osmotic pressure as the external pressure needed to prevent the osmosis process. The required external pressure is the same as the osmotic pressure of the solution.Learn moreRank the solutions according to their respective osmotic pressures in decreasing order https://brainly.com/question/11851605Calculating the pH value of weak base https://brainly.com/question/9040743To make a 0.500 M solution, one could take 0.500 moles of solute and add? https://brainly.com/question/10278982By studying fossils, scientists have learned that A. Both animals and plants have changed over time. B. Plants have changed over time, but animals have not. C. Animals have changed over time, but plants have not. D. Neither animals nor plants have changed over time
Answer:A. Both animals and plants have changed over time.
Explanation:
Because plants and animals go through adaptations.
Answer: A. Both animals and plants have changed over time.
Explanation: study island
Calculate the number of grams of carbon dioxide produced from 6 moles of oxygen gas. List only the number of grams of carbon dioxide C6H10+o2 Co2+h2o
Answer:
[tex]\boxed{\text{190 g}}[/tex]
Explanation:
We know we will need a balanced equation with masses, moles, and molar masses, so let’s gather all the information in one place.
M_r: 44.01
2C₆H₁₀ + 17O₂ ⟶ 12CO₂ + 10H₂O
n/mol: 6
1. Use the molar ratio of CO₂:O₂ to calculate the moles of CO₂.
[tex]\text{Moles of CO$_{2}$ = 6 mol O$_{2}$} \times \dfrac{\text{12 mol CO$_{2}$}}{\text{17 mol O$_{2}$}} =\text{4.24 mol CO$_{2}$}[/tex]
2. Use the molar mass of CO₂ to calculate the mass of CO₂.
[tex]\text{Mass of CO$_{2}$ = 4.24 mol CO$_{2}$} \times \dfrac{\text{44.01 g CO$_{2}$}}{\text{1 mol CO$_{2}$}} = \text{190 g CO$_{2}$}\\\\\text{The reaction will produce }\boxed{\textbf{190 g}}\text{of CO}_{2}[/tex]
How many moles of carbon dioxide gas, co2, are there in 2.94 l of this gas at stp
0.131 mol of carbon dioxide gas, [tex]CO_2[/tex], are there in 2.94 L of this gas at STP.
What is an ideal gas equation?The ideal gas equation, pV = nRT, is an equation used to calculate either the pressure, volume, temperature or number of moles of a gas.
We use the formula PV=nRT. The conditions STP are 1 atm of pressure and 273K of temperature:
PV=nRT
n=[tex]\frac{PV}{RT}[/tex]
n = [tex]\frac{1 atm\; X \;2.94 L}{0,082 l atm/K mol X 273K}[/tex]
n=0.131 mol
Hence, 0.131 mol of carbon dioxide gas, [tex]CO_2[/tex], are there in 2.94 L of this gas at STP.
Learn more about ideal gas equation here:
https://brainly.com/question/12818923
#SPJ2
What is emitted during gamma emission?
Electrons
Light
Alpha particles
Beta particles
Answer
Light
Explanation:
The gamma emission is an electromagnetic radiation, this kind of radiation come from the light.
In gamma ray emission, a gamma ray is photon of light. Given that light does not have mass or charge, the symbol we use to identify it is: 00γ. With two zeroes.
Answer:
electromagnetic radiation
Explanation:
If phosphorus (P) has 4 naturally occurring isotopes, phosphorus-29(32.7.%), phosphorus-30(48.03%), phosphorus-31(18.4%), and phosphorus-33 (0.87%), what is its average r.a.m.?
A. 29.9
B. 123
C. 100
D. 30.75
Answer:
A. 29.9
Explanation:
An element can have differing numbers of neutrons in its nucleus, but it always has the same number of protons. The versions of an element with different neutrons have different masses and are called isotopes. The average atomic mass for an element is calculated by summing the masses of the element’s isotopes, each multiplied by its natural abundance on Earth.Average atomic mass of P = ∑(Isotope mass)(its abundance)
∴ Average atomic mass of P = (P-29 mass)(its abundance) + (P-30 mass)(its abundance) + (P-31 mass)(its abundance) + (P-33 mass)(its abundance)
Abundance of isotope = % of the isotope / 100.
∴ Average atomic mass of P = (29)(0.327) + (30)(0.4803) + (31)(0.184) + (33)(0.0087) = 29.88 a.m.u ≅ 29.9 a.m.u.
So, the right choice is: A. 29.9
The tyndall effect is used to distinguish between
The Tyndall Effect is the effect of light scattering in colloidal dispersion, while showing no light in a true solution. This effect is used to determine whether a mixture is a true solution or a colloid.
The Tyndall Effect in chemistry refers to the scattering of light by particles in a colloid or very fine suspension, making the mixture appear cloudy or opaque. It is used to differentiate between solutions and colloids, and plays a significant role in light scattering phenomena and microscopy.
Explanation:The Tyndall effect is a phenomenon associated with the scattering of light by particles in a colloid or in a very fine suspension. It can be used to differentiate between solutions and colloids as the particles in a colloid are large enough to scatter light, making colloidal mixtures appear cloudy or opaque. For instance, clouds are colloidal mixtures composed of water droplets that are much larger than molecules, but that are small enough that they do not settle out.
Similar effects of light scattering are observed in other phenomena like thin-film interference seen in oil slicks or the varying colors in a soap bubble. In microscopy, contrast agents or stains are frequently used along with light sources to create sharp images of structures or organisms up to about 1000x magnification. These substances can also be differentiated on the basis of their light absorption or reflection properties owing to the Tyndall effect.
Learn more about Tyndall Effect here:https://brainly.com/question/14431922
#SPJ3
A 68-g sample of sodium is at an initial temperature of 42 °c. if 1840. joules of heat are applied to the sample, what is the final temperature of the sodium?
The final temperature of a 68 gram sample of sodium initially at 42°C, after 1840 joules of heat energy are applied, can be calculated using the formula for specific heat capacity. The final temperature results in approximately 63.73°C.
Explanation:Your question involves the concept of specific heat in physics. The specific heat of a substance is the energy required to change the temperature of 1 gram of the substance by 1 degree Celsius. For sodium, this is approximately 1.23 J/g°C.
Given a 68 g sample of sodium, the initial temperature of 42°C, and energy applied of 1840 J, we are looking to find the final temperature. We use the formula q = mcΔT, where q is the heat energy, m is the mass, c is the specific heat capacity, and ΔT is the change in temperature.
First, rearrange the formula to find ΔT: ΔT = q / (mc). Then, substitute the given values: ΔT = 1840 J / (68 g * 1.23 J/g°C) = approximately 21.73°C. To find the final temperature, add this change in temperature to the initial temperature: 42°C + 21.73°C = 63.73°C. Hence, the final temperature of the sodium, after 1840 joules of heat are applied, is approximately 63.73°C.
Learn more about Specific heat and temperature change here:https://brainly.com/question/35709615
#SPJ12
The question involves using the specific heat capacity formula to calculate the final temperature of a sodium sample. By rearranging the formula and inserting the given values, we can calculate the final temperature.
Explanation:The question involves the concept of specific heat capacity, which in physics, is the amount of heat required to change the temperature of a substance. In this case, we are dealing with sodium and we are given the initial temperature, the mass of the sample, and the amount of heat applied.
First, we need to know the specific heat capacity of sodium, which is different from water used in these examples. For sodium, the specific heat capacity is approximately 1.23 J/g°C. The relevant formula to use is q=mcΔT, where 'q' is heat energy, 'm' is mass, 'c' is specific heat capacity, and 'ΔT' is change in temperature (final-initial).
By rearranging the formula to solve for the final temperature, we obtain ΔT = q/(mc), and thus the final temperature is calculated as: final temperature = initial temperature + ΔT. Inserting the given values: ΔT = 1840 J / (68 g * 1.23 J/g°C), will give us the temperature rise, and by adding the initial temperature we can find the final temperature of the sodium.
Learn more about Final temperature calculation here:https://brainly.com/question/18875024
#SPJ2
How many outer atoms and lone pairs are present in a molecule with a square planar shape?
Answer:
4 outer atoms, 2 lone pairs
Explanation:
A square planar molecular structure has four outer atoms bonded to the central atom, and two lone pairs of electrons on opposite sides of the central atom, contributing to the square planar shape.
Explanation:A molecule with a square planar shape essentially has an octahedral electron-pair geometry, but with two lone electron pairs on opposite sides of the central atom. By occupying these positions, the lone pairs minimize repulsions with other atoms and lone pairs around the central atom. As a result, the molecule appears square planar.
In this case, there are four outer atoms bounded to the central atom, without any additional lone pairs on them. The molecule, therefore, also has two lone pairs on opposite sides (180° apart) of the central atom, hence appearing square planar. These two lone pairs are considered when describing the electron-pair geometry, but not when we describe the molecular structure, which focuses on the position of atoms rather than electron pairs.
Learn more about Square planar molecular structure here:https://brainly.com/question/31818810
#SPJ3
A skeleton equation shows just the reactants and products whereas a balanced equation shows the
Answer:
A skeleton equation shows just the reactants and products whereas a balanced equation shows the relative amounts of, or proportion between, reactants and products.
Explanation:
The skeleton equation shows which reactants are being used and which products are being formed.
The reactants are shown on the left and the products are shown on the right side of the equations, separeted by an arrow.
For example, the skeleton equation to obtain water is:
H₂(g) + O₂(g) → H₂O (g)From it you know that hydrogen and oxygen react to form water, yet you do not know in which ratio they do it.
Then, you balance the equation, adding the appropiate coefficients, to make the number of atoms of each kind on the reactant side equal to the number of the same kind of atoms on the product side.
This is, for the example of water, the number of hydrogen atoms on the left must equal the number of atoms of hygrogen on the right side, and the number of oxygen atoms of the left must equal the number of oxygen atoms on the right.
For the water example that is:
2H₂(g) + O₂(g) → 2H₂O (g)Showing that 2 molecuies of hydrogen (or 4 atoms) react with 1 molecule of oxygen (or 2 atoms) to produce 2 molecules of water, and that proportion (relative amounts) will always be true for that reaction.What would the molecule C₂H₄ be classified as?
Alkane
Inorganic compound
Alkyne
Alkene
Answer:
Alkene.
Explanation:
C₂H₄ is the formula of ethene.
C forms four bonds.
Its structure is: CH₂=CH₂.
The bond between the two carbon atoms is double bond.
When the hydrocarbon contains a double bond, it is classified as an alkene.
Which of the following is a single replacement reaction ?
Answer:
well its D Mg + 2HCl ----- MgCl2 + H2
Explanation:
Because Magnesium Replaces Hydrogen
Liquids that dissolve freely in one another in any proportion
Miscible-liquids that dissolve freely in one another in any proportion
Miscible liquids, such as ethanol and water, can be mixed together in any proportion to form solutions. Miscibility is a unique property that facilitates the infinite mutual solubility of these liquids. This concept is different from solubility, which pertains to a solid's ability to dissolve in a liquid, and Henry's law, that relates to gaseous solutes.
Explanation:The question pertains to liquids that can be mixed together in any proportions to form solutions. These liquids are referred to as miscible. Examples of such liquids include ethanol, sulfuric acid, and ethylene glycol, which are all miscible with water. Miscible liquids have infinite mutual solubility, meaning they can dissolve into each other in any ratio.
Miscibility is different from solubility, which refers to a solid's ability to dissolve in a liquid. In contrast, miscibility refers to the ability of two liquids to mix without separating into two stages. For instance, water and oil are considered immiscible because they cannot mix together and will instead separate into two layers.
Another important concept related to the behavior of solutions is Henry's law, which states that the concentration of a gaseous solute in a solution is proportional to the partial pressure of the gas to which the solution is exposed. This law, however, is more relevant when discussing solubilities for gaseous solutes.
Learn more about Miscible Liquids here:https://brainly.com/question/16914887
#SPJ6
Double jeopardy clauses in the fifth amendment make it impossible for a person to be tried of the same crime he’d been exonerated from in the past. Why do you think this is important ?
Answer:
This definitely is important:
Explanation:
Because if the police, FBI, etc., find something else about the case where the man has already been tried for the entire case, otherwise known as the same crime, and not convicted, there is literally nothing that any of them can do because the government would be looked at as not working fast enough. BUT it is also important simply because of the fact that if you are someone who has been tried for the crime, and you weren't actually the one who did it or even simply witnessed it, they can't try you for that same crime even if they find a small smidge as to how you are involved, or if you even witnessed or HEARD it happening. Police sometimes try to convict the person who heard the crime happening simply because they don't know what else to do, or even to try to get the case closed to work on something else, because if you heard the crime happening, then it's counted as involvement in the investigation and the police could also think that it means that you're also involved in the crime itself, but don't have any other evidence as to why or how you could be the criminal in the investigation. It does happen, even if certain or lots of simply random people admit or not.
The double jeopardy clause in the Fifth Amendment is important for several reasons.
Why is this important?The double jeopardy clause in the Fifth Amendment is significant for a few reasons.
First, it stops the government from bothering and punishing people. If the government could try someone again for a crime they were already found not guilty of, it could use its power to overpower the defendant and make it hard for them to have a fair trial.
The double jeopardy clause keeps people from having to go through the emotional and psychological pain of being tried for the same crime more than once. Going through a trial can be very stressful, and being put on trial more than once for the same crime can be really tough.
The double jeopardy clause helps make sure that once someone has been tried and convicted for a crime, they can't be tried and convicted again for the same crime. When someone is found not guilty of a crime, they should be allowed to continue with their life without worrying about facing another trial.
In simple words, the double jeopardy clause helps protect people's rights and keeps the criminal justice system fair. It makes sure that people are not bothered or harmed by the government, and that they don't have to go through the emotional and mental stress of facing many trials for the same crime.
Learn more about fifth amendment
https://brainly.com/question/29528178
#SPJ3
The requirement that a reversible reaction be at equilibrium is that:
- the concentrations on the two sides of the arrow be equal
- the velocity for the forward reaction equal that of the reverse reaction
- there will be as many molecules of the substances on one side of the arrow as there are molecules of the substances on the other side
- the moles of products will equal the moles of reactants
The velocity for the forward reaction equal that of the reverse reaction.
Answer: - the velocity for the forward reaction equal that of the reverse reaction
Explanation:-
Equilibrium constant is defined as the ratio of concentration of product to the concentration of reactants each raised to the power their stoichiometric ratios. It is represented by the symbol 'K'. For the general equilibrium equation:
[tex]aA+bB\rightleftharpoons cC+dD[/tex]
The expression for equilibrium constant is given as:
[tex]K=\frac{[C]^c[D]^d}{[A]^a[B]^b}[/tex]
Characteristics of equilibrium reaction:
Chemical equilibrium are attained is closed system.
The macroscopic remains constant like: volume, pressure, energy etc.
Rate of forward reaction is equal to the rate of backward reaction. The concentration of the reactants and products remain constant.They are not always equal.
An acid is any substance that
A: increases a solution's pH
B: produces hydroxide ions
C: donates a proton
D: acts as a hydrogen acceptor
Answer:
C
Explanation: a is incorrect since the lower the ph = more acidic and b is incorrect because it produces hydronium ion and d I’m not sure what it is but I no that base recieve the protons
If a sample of a gas has an initial volume of 15 L and a pressure of 125 kPa what will the pressure of the gas be (in atm) if the volume is increased to 29 L?
apply Boyle's law
Boyle's Law, an ideal gas law which states that the volume of an ideal gas is inversely proportional to its absolute pressure at a constant temperature
V = 1/P
PV = 1
PV= constant
let 15L = V1 and 125kPa = P1
9L =V2 and P2 = ?
Now from Boyle's law
P1V1 = P2V2
Substitute the values
15L * 125kPa = 29 * P2
P2 = 64.65kPa
convert Pascal's into atm
1 pascal =
9.869 × 10-6 atmosphere
P2 = 64.65 *10^3 *9.869 × 10-6 (kPa is kilo Pascal's)
A solution is made by adding 50.0 ml of 0.200 m acetic acid (ka = 1.8 x 10–5) to 50.0 ml of 1.00 x 10–3m hcl. (a) calculate the ph of the solution.
Answer:
Final pH of the solution: 2.79.
Explanation:
What's in the solution after mixing?
[tex]\displaystyle c = \frac{n}{V}[/tex],
where
[tex]c[/tex] is the concentration of the solute,[tex]n[/tex] is the number of moles of the solute, and[tex]V[/tex] is the volume of the solution.[tex]V(\text{Final}) = 0.050 \;\textbf{L} + 0.050\;\textbf{L} = 0.100\;\textbf{L}[/tex].
Acetic (ethanoic) acid:
[tex]\displaystyle \begin{aligned}n &= c(\text{Before})\cdot V(\text{Before}) \\&= 0.050\;\text{L} \times 0.200\;\text{mol}\cdot\text{L}^{-1}\\ &= 0.0100\;\text{mol}\end{aligned}[/tex].
[tex]\displaystyle \begin{aligned}c(\text{After}) &= \frac{n}{V(\text{After})}\\ &= \frac{0.0100\;\text{mol}}{0.100\;\text{L}}\\ &= 0.100\;\text{mol}\cdot\textbf{L}^{-1}\\ &= 0.100\;\text{M}\end{aligned}[/tex].
Hydrochloric acid HCl:
[tex]\begin{aligned}n &= c(\text{Before})\cdot V(\text{Before})\\ &= 0.050\;\text{L} \times 1.00\times 10^{-3}\;\text{mol}\cdot\text{L}^{-1}\\ &= 5.00\times 10^{-5}\;\text{mol}\end{aligned}[/tex].
[tex]\displaystyle \begin{aligned}c(\text{After}) &= \frac{n}{V(\text{After})}\\ &= \frac{5.00\times 10^{-5}\;\text{mol}}{0.100\;\text{L}}\\ &= 5.00\times 10^{-4}\;\text{mol}\cdot\textbf{L}^{-1}\\ &= 5.00\times 10^{-4}\;\text{M}\end{aligned}[/tex].
HCl is a strong acid. It will completely dissociate in water to produce H⁺. The H⁺ concentration in the solution before acetic acid dissociates shall also be [tex]5.00\times 10^{-4}\;\text{M}[/tex].
The Ka value of acetic acid is considerably small. Acetic acid is a weak acid and will dissociate only partially when dissolved. Construct a RICE table to predict the portion of acetic acid that will dissociate. Let the change in acetic acid concentration be [tex]-x\;\text{M}[/tex]. [tex]x > 0[/tex].
[tex]\begin{array}{c|ccccc}\textbf{R}&\text{CH}_3\text{COOH}\;(aq) &\rightleftharpoons &\text{CH}_3\text{COO}^{-}\;(aq) &+& \text{H}^{+}\;(aq)\\\textbf{I}&0.100\;\text{M} & & & & 5.00\times 10^{-4}\;\text{M}\\\textbf{C}&-x\;\text{M} & & +x\;\text{M} & & +x\;\text{M} \\ \textbf{E}&0.100\;\text{M}-x\;\text{M} & & x\;\text{M} & & 5.00\times 10^{-4}\;\text{M} + x\;\text{M}\end{array}[/tex].
[tex]\displaystyle K_a = \frac{[\text{CH}_3\text{COO}^{-}\;(aq)]\cdot[\text{H}^{+}\;(aq)]}{[\text{CH}_3\text{COOH}\;(aq)]} = \frac{x\cdot(x + 5.00\times 10^{-4})}{0.100 - x}[/tex].
Rewrite as a quadratic equation and solve for [tex]x[/tex]:
[tex]x\cdot(x + 5.00\times 10^{-4}) = (1.8\times 10^{-5} )\cdot (0.100 - x)[/tex]
[tex]x\approx 0.00111[/tex].
The pH of a solution depends on its H⁺ concentration.
At equilibrium
[tex][\text{H}^{+}\;(aq)] = 5.00\times 10^{-4}\;\text{M} + x\;\text{M} = 0.00161\;\text{M}[/tex].
[tex]\text{pH} = -\log{[\text{H}^{+}]} = 2.79[/tex].
To calculate the pH of the given solution, we first use the ICE approach and Henderson-Hasselbalch equation to determine the initial pH. After adding HCL, HCL ionizes to increase the hydronium ion concentration. The pH of solutions with excess titrant is determined mostly by the amount of excess strong base.
Explanation:To calculate the pH of the solution containing 50.0 ml of 0.200 m acetic acid and 50.0 ml of 1.00 x 10-3m hcl, we can use the ICE (Initial - Change - Equilibrium) approach and the Henderson-Hasselbalch equation. Initially, we determine the hydronium ion concentration [H3O+] using the expression: [H3O+] = √(Ka × [CH3CO₂H]). Substituting known values, [H3O+] = √(1.8 × 10-5 × 0.100).
Following that, we can find the initial pH, which is -log([H3O+]). After HCL is added, since HCL is a strong acid, it will further ionize, increasing the [H3O+].
Furthermore, in cases where excess titrant is used, the solution pH is determined mainly by the amount of excess strong base. For instance, if the titrant volume is 37.50 mL, which represents a stoichiometric excess of titrant, and the reaction solution contains both the titration product, acetate ion, and the excess strong titrant, we calculate [OH-] and use that to find pOH and then pH.
Learn more about Solution pH Calculation here:https://brainly.com/question/36153729
#SPJ3
Page 705 #12/#13: Use the changes in oxidation numbers to identify which atom is oxidized, reduced, the oxidizing agent, and the reducing agent. 5
A.
2H2(g) + O2(g) → 2H2O(l)
B.
2KNO3(s) → 2KNO2(s) + O2(g)
Concepts to understand before solving:
-Oxygen is ALWAYS reduced
-OIL- Oxidation Is Loss of electrons
-RIG- Reduction Is Gain of electrons
-the element that is oxidized is the reducing agent
-the element that is reduced is the oxidizing agent
A. 2H2 + O2 —> 2H2O
O is reduced, making it the oxidizing agent
H is oxidized, making it the reducing agent
B. 2KNO3 —> 2KNO2 + O2
O is reduced, making it the oxidizing agent
KNO is oxidized, making it the reducing agent
All of the following equations are statements of the ideal gas law except
a. P = nRTV
b. PV/T = nR
c. P/n = RT/v
d. R = PV/nT
Answer:
The first equation, a. PV = nRT, is not a valid statement of the ideal gas law.Explanation:
The basic expression for the ideal gas law is:
[tex]pV=nRT[/tex] .......... [Equation 1]Where:
n is the number of moles of the gasV is the volume occupied by the gasp is the pressure exerted by the gas moleculesT is the temperature in absolute scale (Kelvin)R is the Universal gas constant (0.0821 atm-liter /K-mol or the equivalents in other units)You can perform different algebraic operations to obtain equivalent equations:
Choice b) Divide equation 1 by T and you get:
pV / T = nR, which is the choice b. from your list.Choice c) Divide equation 1 by n × V and you get:
p/n = RT / V, which is the choice c. from your list.Choice d) Divide equation 1 n × T and you get:
pV / (nT) = R, which is the choice d. from your list.The choice a. p = nRTV states that p and V are in direct relation, when the ideal gas law states that p and V are inversely related, so that equation is wrong.
Conclusion: the choice a, p = nRTV, is not a statement of the ideal gas law.
The option that does not represent the ideal gas law is a. P = nRTV. The correct form of the ideal gas law is PV = nRT, and options b, c, and d can be rearranged to match this form.
The correct form of the ideal gas law is PV = nRT. Let's break down each option:
a. P = nRTV: This is incorrect because it does not correctly isolate P and mismatches the variables.b. PV/T = nR: Rearranging this gives PV = nRT, which is correct.c. P/n = RT/v: This can be rearranged to P = (nRT)/V, which is also correct.d. R = PV/nT: Rearranging gives PV = nRT, which is correct.Thus, the statement that does not represent the ideal gas law is a. P = nRTV.
Which of the following molecules would you expect to act as allosteric activator of an enzyme in glycolysis?ADPNADP+pyruvateNADPH
in absence of oxygen.
i have resd about in my biology textbook.
sorry i kniw this much
What scientist has a element named for them?
Niel bohr - Bohrium 107