a) acid-neutral-base
How many acids are shown? 4
How many bases are shown? 7
What range seems to be missing? 5-6
A cabbage indicator will turn red in an acid solution, purple in a neutral solution, and green to yellow in basic solutions. To find out how many acids or bases are shown in a photo, count the number of solutions that have turned red (for acids) or green to yellow (for bases).
Explanation:Unfortunately, without the specific photo referenced in the question, it's impossible to provide an exact order of the solutions. However, I can explain how to determine if a solution is an acid or base using a cabbage indicator. When a cabbage indicator is added to different solutions, it changes colors based on the pH level of the solution. In acidic solutions, the cabbage indicator turns red, while it turns green to yellow in basic solutions. The neutral solution will have a purple color.
To find out how many acids or bases are shown in the photo, you would count how many of the solutions turn red (for acids) or green to yellow (for bases).
Learn more about cabbage indicator here:https://brainly.com/question/31963334
#SPJ2
The tendency of an element to react with other elements to produce compounds
Answer:
valence electrons
Explanation:
noble gases like argon or neon don't react easily with other elements because they have completely filled outer valence electron shell, but other elements react easily to try and have a noble gas structure.
Final answer:
Chemical reactivity is the propensity of an element to interact with others to form compounds, and it can be observed in reactions such as synthesis or combination reactions, where elements or compounds unite to form a new substance, following the principle that atoms are neither created nor destroyed.
Explanation:
The tendency of an element to react with other elements to produce compounds is termed reactivity, and it describes elements and compounds that are reactive and will readily react with many other substances. Reactive metals, for example, may form halide compounds with halogens or displace hydrogen from dilute acids.
When looking at chemical reactions, we must consider the starting substances that change. These are typically elements or compounds that combine in a reaction. This combination can yield a more complex compound. An example of this is a synthesis reaction, such as when sodium metal reacts with chlorine gas to form sodium chloride:
2 Na (s) + Cl2 (g) → 2 NaCl (s)
In a broader sense, chemical reactions adhere to the principle that atoms of different elements react with each other in fixed whole-number proportions to create compounds. During these reactions, atoms can separate and recombine to form new substances, but they are never created or destroyed.
Chemists have developed ways to categorize reactions to make predictions about which compounds will react and what products will be formed. Familiarity with basic types of reactions such as combination, decomposition, and displacement reactions is crucial. In the realm of combination reactions, one such reaction is the formation of carbon dioxide from the reaction of carbon monoxide with oxygen:
2CO (g) + O2 (g) → 2CO2 (g)
Why do graphite and diamond appear to be different substances if they are composed of the same atom?
Answer:
Diamond and graphite are allotropes of carbon.
Explanation:
Diamond has a close packed crystal structure which is responsible for its extreme hardness. In it, each carbon atom is sp³ hybridised and bonded to four other carbon atoms in a tetrahedral arrangement. Diamond has a hardness of 10 on mohs scale with a cubic crystal form.
Note: allotropes of an element have different molecular structure.
Graphite on the other hand is made up of layers of hexagonal structure that are weakly bonded by van-der-waals forces. This layered arrangement explains its softness/slippery feeling and hence it is used as a lubricant. In each layer, each carbon atom is sp² hybridised and bonded to three other carbon atoms in a trigonal planar arrangement.
The presence of [tex]\pi[/tex] electrons in the layers accounts for its ability to conduct electricity.
A gas has a mixture containing oxygen, nitrogen, & carbon dioxide has a total pressure of 32.0 kPa. If oxygen = 6.6 kPa, nitrogen = 23.0 kPa, what is the pressure of the carbon dioxide ?
Answer:
2.4 kPa.
Explanation:
According to Dalton's law: the total pressure of an ideal gas mixture is equal to the sum of the partial pressures of the gases in the mixture.
Herein;Ptotal = P of O₂ + P of N₂ + P of CO₂.
where, Ptotal is the total pressure = 32.0 kPa,
P of O₂ is partial pressure of oxygen gas = 6.6 kPa,
P of N₂ is the partial pressure of nitrogen gas = 23.0 kPa,
P of CO₂ is the partial pressure of carbon dioxide gas = ??? kPa.
∵ Ptotal = P of O₂ + P of N₂ + P of CO₂.
∴ 32.0 kPa = 6.6 kPa + 23.0 kPa + P of CO₂.
∴ P of CO₂ = 32.0 kPa - (6.6 kPa + 23.0 kPa) = 2.4 kPa.
If a given power plant released so2 gas with a volume v of 1200 m3 at a density ρ of 2.86 kg/m3 at standard pressure and temperature, how many moles n of so2 are released? the atomic weight of sulfur is 32.07 u and the atomic weight of oxygen is 16.00 u.
Answer:
[tex]\boxed{\text{52 840 mol}}[/tex]
Explanation:
Since you have the volume of the gas at STP, we can use the Ideal Gas Law to calculate the number of moles. The identity of the gas doesn't matter.
pV = nRT
n = (pV)/(RT)
Data:
p = 1 bar
V = 1200 m³ = 1.2 × 10⁶ dm³
R = 0.083 14 bar·dm³K⁻¹mol⁻¹
T = 273.15 K
Calculation:
n = (1 bar × 1.2 ×10⁶ dm³)/(0.083 14 bar·dm³K⁻¹mol⁻¹ × 273.15 K)
= 52 840 mol
The power plant releases [tex]\boxed{\text{52 840 mol of SO}_{2}}[/tex].
Linda performed the following trials in an experiment.
Trial 1: Heat 30.0 grams of water at 0 °C to a final temperature of 40.0 °C.
Trial 2: Heat 40.0 grams of water at 30.0 °C to a final temperature of 40.0 °C.
Which statement is true about the experiments?
The heat absorbed in Trial 1 is about 1,674 J greater than the heat absorbed in Trial 2.
The heat absorbed in Trial 1 is about 3,347 J greater than the heat absorbed in Trial 2.
The same amount of heat is absorbed in both the experiments because the heat absorbed depends only on the final temperature.
The same amount of heat is absorbed in both the experiments because the product of mass, specific heat capacity, and change in temperature are the same.
The heat absorbed in Trial 1 is about 3344 Joules greater than the heat absorbed in Trial 2.
Explanation:The heat absorbed in an experiment is calculated using the formula Q = mcΔT, where 'Q' is the heat absorbed, 'm' is the mass of the substance, 'c' is the specific heat capacity of the substance, and 'ΔT' is the change in temperature. Here, the specific heat capacity of water 'c' is approximately 4.18 J/(g*C).
In Trial 1, we have: ΔT = 40.0 - 0 = 40°, and with mass 30.0 g, the heat absorbed (Q1) = mcΔT = 30.0g * 4.18 J/(g*C) * 40°C = 5016 J.
In Trial 2, we have: ΔT = 40.0 - 30.0 = 10°, and with mass 40.0 g, the heat absorbed (Q2) = mcΔT = 40.0g * 4.18 J/(g*C) * 10°C = 1672 J.
Therefore, the heat absorbed in Trial 1 is about 5016 - 1672 = 3344 J greater than the heat absorbed in Trial 2.
Learn more about Heat Absorption here:https://brainly.com/question/12943685
#SPJ12
An atom of aluminum (Al) has an atomic number of 13 and a mass number of 27. How many neutrons does it have?
A) 13
B) 14
C) 27
D) 40
B
Atomic mass = no. of proton
Atomic mass= P +N
27= 13+N
N=14
Answer:
14
Explanation:
The atomic # is how many protons it has, the mass is the total number of protons (P) and neutrons (N).
P+N=M 13+N=27
27-13=14 Neutrons= 14
How do you do question 1-4?
Answer:
Explanation:
4
The acid in this diagram is CH3CH2CH2-COOH. That will turn any litmus to red.
1
I'm not sure I'm reading the question correctly. I think the point is that H2 breaks up and goes on either side of the Double Bond. If that is the case, E is the correct answer. CH3CH2CH2CH3. I'm not totally sure.
2
What is happening here is the equation has progressed to kicking out one of the hydrogens and replacing it with a Br. The other Br and the kicked out Hydrogen combine to form HBr
That means (2) should be C
3
I have no idea what 3 is asking you or telling you to do
This is easy, just read the last question. (Already Asked this question before)
How many grams of Sodium Hydroxide could be produced if 1.2L of 3.0 M Calcium Hydroxide are consumed?
Na2CO3 + Ca(OH)2 --> 2NaOH + CaCO3
Now I know how to do equations like this, just a bit confused on how to use my conversion factors.
Do I need to use the 3.0 Molarity in this equation or can I just use Molar Volume of a gas (22.4L/1 mole)?
You would have to use the molarity of calcium hydroxide to find the moles of calcium hydroxide. Once you have moles, just convert using mole:mole ratio and find the grams of sodium hydroxide.
What is the name of the molecule shown? Will give brainliest if its right.
Please and thank you.
A. 2,2-dimethylpropane
B. Trimethylethane
C. 3-dipropane
D. Pentane
D. Pentane. Pentane has 5 Carbon and 12 Hydrogen, like the molecule shown.
You do not have a separate guest bedroom. Which of the following order of choices is correctly listed from best to worst?
master bedroom, family member’s bedroom, family room
family member’s bedroom, master bedroom, family room
family room, master bedroom, family member’s room
Answer:
master, family member, family room
The best order of choices listed from best to worst is master bedroom, family member’s bedroom, family room.
The correct order of choices from best to worst is:
Master bedroomFamily member's bedroomFamily roomThe master bedroom, being the primary bedroom, should be the best choice. The family member's bedroom is the next suitable option, and the family room is the least private space among the choices provided.
How does the length of the day affect the seasonal temperature
The longer the day, the solar radiation is absorbed and the higher the temperature is.
I hope you have a great rest of your day!
❤
How does the magnitude of the electrical force between a pair of charged objects change when the objects are moved twice as far apart?
Answer:
The magnitude of the force decreases by a factor 4
Explanation:
The magnitude of the electrical force between a pair of charged objects is given by
[tex]F=k\frac{q_1 q_2}{r^2}[/tex]
where
k is the Coulomb's constant
q1, q2 are the charges of the two objects
r is the distance between the two objects
In this problem, the two objects are moved twice as far apart, so their distance becomes
r' = 2r
Substituting into the equation, we find the new force
[tex]F'=k\frac{q_1 q_2}{r'^2}=k\frac{q_1 q_2}{(2r)^2}=\frac{1}{4}(k\frac{q_1 q_2}{r^2})=\frac{1}{4}F[/tex]
The electrical force between two charged particles decreases when the distance between these particles is increased. If the distance is doubled, the force becomes a quarter of the original due to the inverse square law of Coulomb's Law.
Explanation:The magnitude of the electrical force between two charged objects is governed by Coulomb's Law which states the force is directly proportional to the product of the charges and inversely proportional to the square of the distance between them. Increasing the distance between the objects would cause a corresponding decrease in force. Specifically, if the distance between the pair of charged objects is doubled, the force will be reduced to one-fourth (1/4) of what it was initially as the relationship is based on an inverse square law.
In simpler words, if you double the distance, the force becomes weaker and reduces to a quarter of its original value.
Learn more about Electrical Force here:https://brainly.com/question/20935307
#SPJ11
Which process has been largely responsible for increasing the amount of co2 in the last 200 years? increasing cattle ranching worldwide burning of fossil fuels?
Answer:
worldwide burning of fossil fuels
Explanation:
The heavy usage of the fossil fuels as energy sources for the industry has resulted in much increased emissions of CO2 in the atmosphere. It all started around 200 years ago with the Industrial Revolution. In order for the machines to function, efficient energy sources were needed, and the best thing at that time for that was the coal. Through the burning, the coal manages to release enormous amounts of CO2 into the atmosphere. After some time, the oil was discovered as well, and it started to be heavily used as well, further increasing the CO2 emissions. As the technology has been developing more and more, the demand for the usage of the fossil fuels has been increasing constantly, so there's an ever growing CO2 emissions into the atmosphere.
Select the correct answer. What is the percent composition of silicon in silicon carbide (SiC)? A. 28% B. 50% C. 70% D. 142%
Answer:
C. 70%
Explanation:
Atomic Mass of the silicon = 28 g.
Atomic mass of the Carbon = 12 g.
Total mass of the Silicon Carbide = 28 + 12
= 40 g.
Now, Using the formula.
% Composition = Mass of the silicon/Total mass of the compound × 100 %
= 28/40 × 100 %
= 70 %
Hence, % composition of the silicon in SiC is 70%
Hello! I need help with this question asap please! ;-;
Match the following chemical reactions: A, B, C, and D are elements.
A + BC ---- AC + B Combustion
AB + BD --- AC + BD Synthesis
A + O2 - AO Combustion
AB -- A + B Single Replacement
A + B - AB Double Replacement
AC + O2 - CO2 + H2O Decomposition
Answer:
A + BC → AC + B Single Replacement
AB + CD → AC + BD Double Replacement
A + O₂ → AO Combustion
AB → A + B Decomposition
A + B → AB Synthesis
AC + O₂ → CO₂ + H₂O Combustion
Explanation:
Single replacement is a type of chemical reaction where an element reacts with a compound and takes the place of another element in that compound.So, A + BC → AC + B is an example for single replacement reaction.
Here, A replaces B in the compound BC.
Double Replacement is a type of chemical reaction where two compounds react, and the positive ions (cation) and the negative ions (anion) of the two reactants switch places, forming two new compounds or products.So, AB + CD → AC + BD is an example for double replacement reaction.
Here, A replaces C in the compound CD and B replaces D in the compound CD.
Combustion reactions always involve molecular oxygen O₂. Anytime anything burns (in the usual sense), it is a combustion reaction. Combustion reactions are almost always exothermic (i.e., they give off heat).So, A + O₂ → AO and AC + O₂ → CO₂ + H₂O are examples of combustion reactions.
Decomposition reactions is a type of chemical reaction in which a single compound breaks down into two or more elements or new compounds. These reactions often involve an energy source such as heat, light, or electricity that breaks apart the bonds of compounds.So, AB → A + B is an example for decomposition reactions.
where Ab is decomposed for A and B.
Synthesis is a type of reaction in which multiple reactants combine to form a single product. Synthesis reactions release energy in the form of heat and light, so they are exothermic.So, A + B → AB is an examples for the synthesis reactions.
NO2 and N2O4 undergo the reaction shown. When a sealed
container of NO2 reaches chemical equilibrium, which must be true?
A) No N2O4 is present.
B) No chemical reactions are occurring.
C) The rates of the forward and reverse reactions are equal.
D) The maximum number of molecules has been reached.
Answer:
Option C) The rates of the forward and reverse reactions are equal.Explanation:
NO₂ and N₂O₄ undergo the following equilibrium reaction:
2NO₂(g) ⇄ N₂O₄(g)That is a reversible reaction, i.e. there are two simultaneous reactions: the direct or forward reaction and the reverse reaction:
Direct reaction: 2NO₂(g) → N₂O₄(g) Reverse reaction: 2NO₂(g) ← N₂O₄(g)At the beginning, only NO₂(g) is in the sealed container. The NO₂ concentration is maximum, and the rate of the forward reaction is maximum.
As the reaction progresses, the concentration of NO₂ diminishes, and, consequently, the rate of the forward reaction decreases.
As soon as the N₂O₄ appears, the reverse reaction starts. At the beginning the rate is low, but as the N₂O₄ concentration increases the rate of the reverse reaction increases.
When both forward and reverse rates become equal the equilibrium has been reached. This is what is called a dynamical equilibrium.
Then, as per the choices, you have that, at equilibrium:
A) No N₂O₄ is present:
False: as explained above, at equilibrium both NO₂ and N₂O₄ are present.B) No chemical reactions are occurring.
False: as explained above, at equilibrium both forward and reverse reaction are occurring at the same rate.C) The rates of the forward and reverse reactions are equal.
True: as explained, this is the meaning of dynamic equilibrium.D) The maximum number of molecules has been reached.
False: the number of molecules of each compound at equilibrium will be given by the constant of equiibrium, Keq = [N₂O₄] / [NO₂]², and this value varies with the temperature.On a protein molecule, side chains of amino acids affect
only the primary structure
primary and secondary structures
secondary and tertiary structures
tertiary and quaternary structures
The correct answer is "On a protein molecule, side chains of amino acids affect only the primary structure." If this is correct and was helpful could you mark me as brainlist? Thanks!
The amino acids side chain forms the basis for the conformation of peptide and affects the primary and secondary structure. Thus, option B is correct.
What are proteins?Proteins are the biomolecules composed of the amino acid chain bond with the peptide bond. The amino acids are composed of amino and carboxyl terminal, with a side chain determining the polarity.
The side chain forms the hydrogen bond and other type of bond in the peptide chain, and thereby governs the primary and the secondary structure of the protein. Thus, option B is correct.
Learn more about protein, here:
https://brainly.com/question/17095120
#SPJ2
Which describes the role of energy in photosynthesis and cellular respiration?
A) Energy is needed to start photosynthesis and is a product of cellular respiration. B)Without light energy, photosynthesis and cellular respiration cannot occur. C)Energy is both a reactant and product in photosynthesis and in cellular respiration.
Answer:
A) Energy is needed to start photosynthesis and is a product of cellular respiration.
Explanation:
Answer: A). Energy is needed to start photosynthesis and is a product of cellular respiration.
Explanation:
Energy in the form of sunlight is absorbed by the plants so as to prepare their food (carbohydrates)in the process of photosynthesis.
The energy is produced in the process of cellular respiration. The cellular respiration involves the break down of glucose molecules in the food in the form of energy currencies called as ATP (Adenosine triphosphate) molecules. This form of energy is required for regulating cellular metabolism and vital functions.
Which system does not allow for matter or energy to be exchanged outside the system?
Isolated systems
Open system
All systems
Closed system
Isolated systems does not allow any matter or energy to be exchanged.
Isolated system does not allow for matter or energy to be exchanged outside the system.
What is isolated system ?Isolated system is a thermodynamic system that does not allow the exchange of either matter or energy outside the system.
What is Open system ?Open system is a thermodynamic system that can exchange the matter and energy with its surrounding.
What is Closed system ?A closed system is a thermodynamic system in which the exchange of energy is allowed but the exchange of matter is not allowed outside the system.
Thus, from the above conclusion we can say that Isolated system does not allow for matter or energy to be exchanged outside the system.
Learn more about the isolated System here: https://brainly.com/question/2278830
#SPJ2
Gaseous hydrogen and oxygen can be prepared in the laboratory from the decomposition of gaseous water. The equation for the reaction is2H2O(g) --> 2H2(g)+O2(g)Calculate how many grams of O2(g) can be produced from 42.6 grams of H2O(g).
Answer:
75.5 g O₂ (g) can be produced from 42.6 g of H₂O (g)Explanation:
1) Balanced chemical equation (given):
2H₂O(g) → 2H₂(g) + O₂(g)2) Mole ratios:
2 moles H₂O(g) : 2 moles H₂(g) : 2 moles O₂(g)3) Calculate the number of moles of reactant (H₂0):
number of moles = mass in grams / molar massmolar mass of water: 18.015 g/molmass in grams of water: 42.6 gnumber of moles = 42.6 g / 18.05 g/mol = 2.36 moles H₂O4) Set a proportion using the mole ratio O₂ to H₂O and the actual number of moles of H₂O:
2 moles O₂ / 2 moles H₂O = x / 2.36 moles H₂Ox = 2.36 moles O₂5) Convert 2.36 moles O₂ to grams:
mass in grams = number of moles × molar massmass = 2.36 moles × 32.00 g/mol = 75.5 g O₂Answer:
37.87 g of oxygen can be produced from the 42.6 grams of H2O
Explanation:
From the question, the following equation shows the decomposition of gaseous water
2H₂O(g) ⇒ 2H₂(g) + O₂(g)
where atomic mass of hydrogen is 1 g/mol and atomic mass of oxygen is 16 g/mol
The molar mass of 2H₂O is;
2[(2 ×1) + (16 × 1)]
2(2+16) = 36 g
The molar mass of O₂ is;
2 × 16 = 32 g
Hence, it can be deduced that 36 g of water produced 32 g of oxygen, hence 42.6g of water will produce how many grams of oxygen (represented as X)
∴ 36 ⇒ 32
42.6 ⇒ X
X = 42.6 × 32/36
X = 37.87 g
Unless it hits something, a bullet fired towards the sky experiences a constant rate deceleration as soon as it is fired from a gun.
True False
Got it right on the exam
Rhea has a balloon that contains 0.5 mole of helium. how many particles of helium are in the balloon?
Answer:
[tex]\boxed{3 \times 10^{23}}[/tex]
Explanation:
1 mol of helium contains 6.022 × 10²³ atoms
[tex]\text{Atoms of He} =\text{0.5 mol He} \times \dfrac{ 6.022 \times 10^{23} \text{ atoms He}}{\text{1 mol He}}= 3 \times 10^{23} \text{ atoms He}[/tex]
The balloon contains [tex]\boxed{3 \times 10^{23} \text{ atoms of He}}[/tex].
69.253 helium particles are in the balloon.
What is helium particles?Helium is composed of two electrons bound by the electromagnetic force to a nucleus containing two protons along with either one or two neutrons, depending on the isotope, held together by the strong force. Unlike for hydrogen, a closed-form solution to the Schrodinger equation for the helium atom has not been found.
A helium atom is an atom of the chemical element helium. Helium is composed of two electrons bound by the electromagnetic force to a nucleus containing two protons along with either one or two neutrons, depending on the isotope, held together by the strong force. Unlike for hydrogen, a closed-form solution.
Helium is the element which you can find on the upper right side of the periodic table with atomic number 2. It comes first amongst the family of the noble gases. Helium falls under inert gas since its outermost electron orbital is full with two electrons.
The answer is 69.253.
Learn more about helium, refer:
https://brainly.com/question/25306199
#SPJ2
How do you do this problem?
Answer:
B
Explanation:
If the temperature of the water goes up, the reaction is exothermic (heat is being given away by the equation -- more precisely the reactants of the equation). Only A and B can be true. In order for the reaction to occur, the water has to absorb the heat. It's temperature goes up. Remember that minus sign. It is almost the key fact for this question.
The question is not as hard as it looks, but that is easy for me to say.
m = 100 g
c = 4.2 J/(g * oC)
deltaT = 21 - 20 degrees = 1 degree.
Heat = 100 * 4.2 * 1
Heat = 420 J
Heat = 420 * [1 kJ/1000 J]
Heat = -0.42 kJ
B
A book with a weight of 12 N rests on its back cover. If the back cover measures 0.21 m by 0.28 m, how much pressure does the book exert?
A. 42 Pa
B. 57 Pa
C. 12.46 Pa
D. 204 Pa
Answer:
option D = 204 Pa
Explanation:
Given data:
Weight of book = 12 N
Area of book = 0.21 m × 0.28 m = 0.0058 m²
Pressure of book = ?
Solution:
formula
pressure = force / area
P = f/ A
now we will put the values in formula,
P = 12 N/ 0.0058 m²
P= 204 Nm⁻² ( Nm⁻²= Pa)
P = 204 Pa
The correct Answer is option (D). The pressure exerted by the book is approximately 204 Pa.
To find the pressure exerted by the book, we can use the formula for pressure:
[tex]\[ \text{Pressure} = \frac{\text{Force}}{\text{Area}} \][/tex]
First, calculate the area of the back cover:
[tex]\[ \text{Area} = \text{length} \times \text{width} \][/tex]
[tex]\[ \text{Area} = 0.21 \, \text{m} \times 0.28 \, \text{m} \][/tex]
[tex]\[ \text{Area} = 0.0588 \, \text{m}^2 \][/tex]
Now, calculate the pressure:
[tex]\[ \text{Pressure} = \frac{12 \, \text{N}}{0.0588 \, \text{m}^2} \][/tex]
[tex]\[ \text{Pressure} \approx 204.08 \, \text{Pa} \][/tex]
Rounding to the nearest whole number, the pressure exerted by the book is approximately 204 Pa.
Which of the following would most likely be oxidizing agents, and which would most likely be reducing agents? (Hint: Think in terms of tendencies to lose or gain electrons.) a. Cl2 b. K c. Ag+ d. Zn2+
Answers:
a) Cl₂: oxidizingb) K: reducingc) Ag⁺: oxidizingd) Zn²⁺: oxidizingExplanation:
An oxidizing agent is one that accepts electrons, being reduced, and oxidizing other atoms.A reducing atent is one that releases electrons, getting oxidized and reducing other atoms.See each choice:
a. Cl₂
Cl₂ is the diatomic molecule formed by the covalent bonding of two Cl atoms.The oxidation state of the molecule is zero (this is a rule, the oxidation state of any atom alone or bonded to other atom of the same kind is zero).Since, Cl is highly electronegative, it will mostly behave as oxidizing agent, i.e. it will accept electrons reducing itself while oxidizing other atoms.b. K
K (potassium) is an alkaline metal, which means that it has a valence electron. It is relatively easy for K to donate its electron. In this process K will oxidize itself (incrrease its oxidation state) while reduce other atoms, so this is would most likely be a reducing agent.c. Ag⁺
Since, Ag⁺ has a positive charge, it will gain stability by accepting an electron, meaning that it will get reduced, most likely being an oxidizing agent.d. Zn²⁺
Similarly to the case above, the cation Zn²⁺ would gain stability by gaining electrons, which means that it would most likely get reduced, and be an oxidizing agent.In terms of gaining and losing electrons, Cl2 and Ag+ (which gain electrons) are oxidizing agents. K, which loses an electron, is a reducing agent. Zn2+ also gaining electrons, acts also as an oxidizing agent.
Explanation:In terms of tendencies to lose or gain electrons, a substance that tends to gain electrons and acts in oxidation reactions is called an oxidizing agent. Conversely, a substance that tends to lose electrons and acts in reduction reactions is known as a reducing agent.
Looking at the substances in question: a. Cl2 tends to gain electrons and hence would act as an oxidizing agent. b. K tends to lose an electron, and thus it would be a reducing agent. The c. Ag+ ion would gain an electron to become neutrally charged Ag, making it an oxidizing agent. Lastly, d. Zn2+ can also gain electrons and become neutral, making it an oxidizing agent as well.
Learn more about Redox Agents here:https://brainly.com/question/30068396
#SPJ3
A train approaching a crossing changes speed from 10 m/s to 25 m/s in 240 s. How can the train's acceleration be described?
Answer:
[tex]\boxed{\text{The train is speeding up by 0.0625 m/s every second}}[/tex]
Explanation:
Acceleration (a) is the change in velocity (Δv) divided by the change in time (Δt).
[tex]a = \frac{\Delta v}{\Delta t} = \frac{v_{2} - v_{1} }{t_{2} - t_{1}} \\\\a = \frac{25 - 10}{240 - 0}=\frac{15 }{240}=\text{0.0625 m/s}^{2}\\\\\ \boxed{\textbf{The train is speeding up by 0.0625 m/s every second}}\\[/tex]
1. Household bleach (NaOCl) is really a solution of sodium hypochlorite in water. It is made by reacting chlorine gas and sodium hydroxide, as shown in the unbalanced chemical equation below: NaOH (aq) + Cl2 (g) → NaOCl (aq) + NaCl (aq) + H2 O (l) A student bubbles 83.0g of chlorine gas into an excess of aqueous sodium hydroxide. After analyzing his products, he determines that 22.0 grams of bleach are actually made. (a) What is the oxidation number of chlorine in bleach (NaOCl)? (b) Is this reaction above redox? Explain. (c) What is the percent yield of this reaction?
This is a three-part question
Answers:
a) The oxidation number of chlorine in bleach (NaOCl) is +1.b) Yes, this is a redox reactionc) The percen yield is 56.8%Explanation:
1) Part (a) What is the oxidation number of chlorine in bleach (NaOCl)?
a) Rule one: In a neutral compound the sum of the oxidation states is zero.
Since NaOCl is a neutral compound the sum of the oxidation states of Na, O and Cl is 0.
b) Rule two: since Na is an alkaline metal, its oxidation state is +1
c) Rule three: the most common state of oxygen, except in peroxides, is -2.
Then,
Na: +1O: -2Cl: xSum = +1 - 2 + x = 0 ⇒ x = 2 - 1 = 1
Conclusion: the oxidation state of NaOCl is +1.
2) Part (b) Is this reaction above redox?
In a redox reaction the oxidation states of some substances increase (get oxidized) and the oxidation states of some substances decrease (get reduced).
The reaction is represented by the chemical equation given:
NaOH (aq) + Cl₂ (g) → NaOCl (aq) + NaCl (aq) + H₂O (l)Since the chlorine gas (Cl₂) is a molecule of only chlorine atoms, its oxidation state is zero, and since chlorine is forming compounds on the right side (NaOCl and NaCl) you can immediately conclude that the oxidation state of chlorine changed, and this is a redox reaction.
In fact:
Oxidation state of Cl in Cl₂: 0Oxidation state of Cl in NaOCl: +1 (previously determined)Oxidation state of Cl in NaCl: -1 (becasue Na has oxidation state +1 and so +1 - 1 = 0).Therefore, chlorine is being oxidized (its oxidation state increases from 0 to +1) and is also being reduced (its oxidation state is reduced from 0 to -1), and this is a redox reaction.
3) Part (c) What is the percent yield of this reaction?
a) Chemical equation (given)
NaOH (aq) + Cl₂ (g) → NaOCl (aq) + NaCl (aq) + H₂O (l)b) Theoretical mole ratio:
2 mol Cl₂ (g) : 1 mol NaOCl (aq)c) Convert 83.0 g of chlorine gas to moles:
moles = mass in grams / molar massmolar mass of Cl₂(g) = 79.906 g/molmoles = 83.0 g / 79.906 g/mol = 1.039 mol Cl₂(g)d) Determine the theoretical yiedl using proportions:
x / 1.039 mol Cl₂ (g) = 1 mol NaOCl / 2 mol Cl₂ (g)⇒ x = 0.5195 mol NaOCle) Convert 0.5195 mol NaOCl to grams:
molar mass NaOCl = 22.99 g/mol + 16.00 g/mol + 35.453 g/mol = 74.443 g/molmass = number of mol × molar mass = 0.5195 mol × 74.443 g/mol = 38.67 gThat must be rounded to 3 significant figures (such as the mass of belach is given: 22.0 g)
Theoretical yiedl of NaOCl = 38.7 gf) Calculate the percent yiled:
Percent yield = (actual yield / theoretical yield) × 100Percent yield = (22.0 g / 38.7 g) × 100 = 56.8%Which molecular formula is written incorrectly?
CO
CH4
Br4Si
N2
I believe your answer would be the 3rd one
Answer:
[tex]Br_{4}Si[/tex] is written incorrectly
Explanation:
In a molecular formula, the central atom in it's lewis structure is written first followed by other bonded atoms.
The least electronegative atom (except H) is the central atom in a lewis structure.
In [tex]Br_{4}Si[/tex], Si is the least electronegative atom as Br has higher electronegativity than Si. Therefore Si is the central atom in lewis structure of [tex]Br_{4}Si[/tex]. So molecular formula of [tex]Br_{4}Si[/tex] should be written as [tex]SiBr_{4}[/tex].
In all other cases, the least electronegative atom have been written first.
So, [tex]Br_{4}Si[/tex] is written incorrectly.
Excess oxygen gas (O2) reacts with 244g of Iron (Fe) to produce 332 g of Fe2O3. What is the percent yield?
Answer:
95.15%
Explanation:
To calculate the percent yield, we need the following formula:
[tex]\% yield=\dfrac{actual yield}{theoreticalyield}\times100\%[/tex]
Solving for the theoretical yied, you need to predict how much of the product will be produced if we USE up the given.
Our given is 224g of Fe and we to get the theoretical yield, we need to figure out how much product will Fe produce supposing that we use up all the reactant.
First thing we do is get the balance equation of this chemical reaction:
4Fe + 3O₂ → 2Fe₂O₃
We get the ratio between Fe and the the product, Fe₂O₃
[tex]\dfrac{4moles of Fe}{2molesofFe_{2}O_{3}}=\dfrac{2moles of Fe}{1moleofFe_{2}O_{3}}[/tex]
This basically means that we need 2 moles of Fe to produce 1 mole of Fe₂O₃. We'll use this later.
Now we let's use our given:
We need to first convert our given to moles. To do this, we need to determine how many grams there are of the reactant for every mole. We need to first get the atomic mass of the elements involved in the substance:
Iron(1)
Fe = 55.845(1) = 55.845g/mole(1)
Then we use this to convert grams to moles
[tex]244g\times\dfrac{1mole}{55.845g}=4.369moles[/tex]
This means that there are 4.396moles of Fe in 244g of Fe.
This we will use to see how many moles of product we can produce given the moles of reactant by using the reactant:rproduct ratio.
[tex]4.369moles of Fe\times\dfrac{1moleofFe_{2}O_{3}}{2molesofFe}=2.185 moles of Fe_{2}O_{3}[/tex]
So given 4.693 moles of Fe we can produce 2.185 moles of Fe₂O₃
The next step is to get how many grams of product there are given our calculation. We do this again by getting how many grams of Fe₂O₃ there are in 1 mole.
Fe(2) O(3)
Fe₂O₃=55.845(2) + 15.999(3)
= 111.69 + 47.997 =159.687g/mol
We then use this to solve for how many grams of product there are in 2.185 moles.
[tex]2.185moles\times\dfrac{159.687g}{1mole}=348.92g[/tex]
This is our theoretical yield 348.92g of Fe₂O₃.
We can finally use our percent yield equation. Our actual yield is given by the probelm, 332g of Fe₂O₃ and we solved for our theoretical yield which is 348.92g of Fe₂O₃. We plug this in our formula and solve.
[tex]\%yield=\dfrac{actual yield}{theoreticalyield}\times100\%[/tex]
[tex]\%yield=\dfrac{332gofFe_{2}O_{3}}{348gofFe_{2}O_{3}}\times100\%=95.15\%[/tex]
So the answer is 95.15%
What is pH?
A. How basic a solution is
B. The concentration of potassium ions in solution
C. How acidic a solution is
D. The concentration ions in a solution
Final answer:
pH is a measure of how acidic or basic a solution is, based on the hydrogen ion concentration. The pH scale ranges from 0 to 14, where values below 7 are acidic and above 7 are basic. It is calculated as the negative logarithm of the hydrogen ion concentration.
Explanation:
Understanding pH
What is pH? pH is a measure that indicates the acidity or basicity (alkalinity) of a solution. It is a scaled value ranging from 0 to 14 where:
A pH of 7 is considered neutral; neither acidic nor basic.
Values below 7 indicate an acidic solution with a higher concentration of hydrogen ions (H+).
Values above 7 indicate a basic solution with a lower concentration of hydrogen ions.
The pH is calculated as the negative, base-10 logarithm of the hydrogen ion concentration in the solution. A lower pH number means a higher concentration of hydrogen ions and therefore a more acidic solution. Conversely, a higher pH means a lower concentration of hydrogen ions and a more basic solution. The pH scale is a concise way to represent the hydrogen ion concentration, which varies markedly among different solutions and affects their properties.