Answer:
A negatron emission
Explanation:
We know that radioactivity orginates from instability of the nucleus. When the nucleus is unstable, radioactive emissions are produced in the form of any of these rays:
> Alpha particle emisson
>Beta particles
> Gamma rays
These emissions create a balance for a radioactive decay.
In balancing nuclear reactions we make sure that the charges on both sides must be conserved and that the mass number and atomic numbers conserved too. This means that the sum of mass number and atomic numbers on both side of the reaction must be equal.
The nucleons are the protons and neutrons, they add up to give the mass number. The atomic number is the proton number.
For the given radioactive reaction:
²³¹₉₀Th → ²³¹₉₁Pa + ?
From this equation, we see that the mass number is conserved but the atomic number is not.
The mass number is the superscript whereas the atomic number is the subscript.
Let's say the decay produces an emission of a particle denoted by X
²³¹₉₀Th → ²³¹₉₁Pa + ᵃₙX
What would the nature of X be?
For the charges and masses to be conserved, X must have mass number of 0 and an atomic number of -1.
Checking:
Mass number:
231 = 231 + a ( a is the mass number)
a = 231 - 231 = 0
Atomic number:
90 = 91 + n
n = 90- 91 = - 1
With X having a mass number of 0 and an atomic number of -1, we have a beta particle emission. Specifically, a negatron has been emitted.
A negatron is denoted as ⁰₋₁β which perfectly makes the equation conserved and suits the description of X.
The complete equation is thus written as:
²³¹₉₀Th → ²³¹₉₁Pa + ⁰₋₁β + energy
In the decay of thorium-231 to protactinium-231, a neutron inside the thorium nucleus converts to a proton, resulting in the emission of a beta particle to conserve charge and nucleon number.
The decay of the element thorium-231 (231/90Th) to protactinium-231 (231/91Pa) involves the emission of a decay particle. According to the laws of conservation of charge and nucleon number, we can determine the type of decay and the particle emitted by examining the change in atomic and mass numbers.
231/90Th decays to 231/91Pa which indicates that the mass number has not changed (indicating the total number of protons and neutrons remains constant) but the atomic number has increased by one. This suggests that a neutron has transformed into a proton and the particle emitted must account for the negative charge to conserve the total charge. Since a neutron (n) converting to a proton (p) emits a beta-minus particle ({{e}}) (an electron), which has a negative charge, the decay particle is therefore identified as a beta particle.
How much chlorine should be produced if 84.2 grams of aluminum chloride and 68.4 grams bromine are combined? 2AlCl3 + 3Br2 —> 3AlBr3 + 2Cl2
Answer:
20.27 g.
Explanation:
From the balanced reaction:2AlCl₃ + 3Br₂ → 3AlBr₃ + 2Cl₂,
2.0 mole of AlCl₃ reacts with 3.0 moles of Br₂ to produce 3.0 mole of AlBr₃, and 2.0 mole of Cl₂.
We need to calculate the no. of moles of (84.2 g) of AlCl₃ and (68.4 g) of Br₂:no. of moles of AlCl₃ = mass/molar mass = (84.2 g)/(133.34 g/mol) = 0.6315 mol.
no. of moles of Br₂ = mass/molar mass = (68.4 g)/(159.808 g/mol) = 0.4288 mol.
AlCl₃ reacts with Br₂ with (2: 3) molar ratio,
So, 0.2859 mole (the remaining is in excess) reacts completely with 0.4288 mole of Br₂.
Using cross multiplication:
2.0 moles of AlCl₃ produce → 2.0 moles of Cl₂.
∴ 0.2859 mole of AlCl₃ produce → 0.2859 mole of Cl₂.
∴ The amount of Cl₂ produced = no. of moles x molar mass = (0.2859 mol)(70.906 g/mol) = 20.27 g.
Final answer:
To determine the amount of chlorine produced from 84.2 grams of aluminum chloride and 68.4 grams of bromine, we calculate that approximately 20.56 grams of chlorine gas would be produced, considering bromine as the limiting reactant.
Explanation:
The question: How much chlorine should be produced if 84.2 grams of aluminum chloride and 68.4 grams of bromine are combined? Firstly, we need to convert the mass of the reactants to moles using their molar mass. The molar mass of aluminum chloride (AlCl₃) is approximately 133.34 g/mol and that of bromine (Br₂) is about 159.808 g/mol. Therefore, 84.2 grams of AlCl₃ equals 0.63 mol and 68.4 grams of Br₂ equals 0.43 mol.
According to the balanced chemical equation 2AlCl₃ + 3Br₂ → 3AlBr₃ + 2Cl₂, two moles of AlCl₃ react with three moles of Br₂ to produce two moles of Cl₂. Thus, the theoretical yield of Cl₂ can be determined based on the limiting reactant. Given the ratio, Br₂ is the limiting reactant as it would require 0.84 moles of AlCl₃ to fully react with 0.43 moles of Br₂. Since 0.43 moles of Br₂ only reacts with 0.29 moles of AlCl₃ to produce chlorine, by the stoichiometry of the reaction, this would yield 0.29 moles of Cl₂.
The mass of Cl₂ produced can then be calculated as mass = moles × molar mass of Cl₂ (70.90 g/mol), giving approximately 20.56 grams of chlorine gas. This estimation provides an understanding of stoichiometry and the limiting reactant concept in chemical reactions.
35.6Ml of an HBr solution were tirated with 18.2 ml of a 0.115M naoh solution to reach equivance point. what is the molarity of the hbr solution
Answer:
0.058 M
Explanation:
HBr reacts with NaOH and forms NaBr and H₂O as the products. The balanced equation is as follows:
[tex]NaOH + HBr \implies NaBr + H_2O[/tex]
Molarity (M) = moles of solute (mol) / volume of the solution (L)
Molarity of NaOH = 0.115 M
Volume of NaOH = 18.2 mL = 18.2 x 10⁻³ L
So, moles of NaOH = molarity x volume of the solution
= 0.115 M x 18.2 x 10⁻³ L
= 2.093 x 10⁻³ mol
From the equation, we can see that the ratio between NaOH and HBr is 1 : 1.
Therefore, moles of HBr in 35.6 mL = moles of NaOH added = 2.093 x 10⁻³ mol
Hence, molarity of HBr = 2.093 x 10⁻³ mol / 35.6 x 10⁻³ L = 0.058 M
0.0588
This is what I got, and my online school curriculum said it was correct.
Which substance has a nonpolar covalent bonds?
Cl2
SO3
SiO2
CCl4
Answer:
Substance with a nonpolar covalent bonds is [tex]Cl_2[/tex].
Explanation:
Polar covalent compound: This compound is formed when difference in electronegativity between the atoms is present. When atoms of different elements combine, it results in the formation of polar covalent bond. For Example: [tex]CO_2,NO_2[/tex] etc..
Non-polar covalent compound: This compound is formed when there is no difference in electronegativity between the atoms. When atoms of the same element combine, it results in the formation of non-polar covalent bond. For Example: [tex]N_2,O_2[/tex] etc.
Substance with a nonpolar covalent bonds is [tex]Cl_2[/tex].
Among the options, Cl2 is the only substance that contains nonpolar covalent bonds because the two chlorine atoms share the pair of electrons equally having the same electronegativity.
Explanation:
The substance that contains nonpolar covalent bonds among the listed options is Cl2. Nonpolar covalent bonds occur when two atoms share a pair of electrons equally, usually seen in diatomic elements or compounds with the same elements. In Cl2, two chlorine atoms share the pair of electrons equally since they have the same electronegativity, hence, it forms a nonpolar covalent bond.
On the other hand, SO3, SiO2, and CCl4 contain polar covalent bonds because the bonding electrons are not shared equally due to a difference in electronegativity of the atoms involved.
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what is the name of this hydrocarbon?
Answer:
Pentane
Explanation:
Need help on this ASAP !!!!
Answer:
C₃H₈ + 5O₂ → 3CO₂ + 4H₂O.
Explanation:
To balance the equation, you should apply the law of conservation of mass for the equations.
The law of conservation of mass states that the no. of each atom is equal in both sides (reactants and products).
Hydrocarbon is burned in oxygen to produce CO₂ and H₂O.
So, the given equation is balanced as:
C₃H₈ + 5O₂ → 3CO₂ + 4H₂O.
that 1.0 mole of C₃H₈ is burned in 5.0 moles of O₂ to produce 3.0 moles of CO₂ and 4.0 moles of H₂O.
The no. of all atoms is the same in both of reactants and products side.
C (3), O (10), and H (8).
Which of the following is least able to transfer electrons?
Answer:
insulators
Explanation:
Insulators are meant to stop the conduction of electricity using materials that are non-conductive, like rubber, glass, or cable covers.
Can some help me do this we have a final tomorrow and i have now idea how to do it. Step by Step explanation and tips If you know any
Answer:
87.27 grams
Explanation:
The mole ratio of nitrogen to hydrogen is 1:3; while that one of hydrogen to the products (ammonia) is 3:2
Thus if 3 moles of hydrogen gas produce 2 moles of ammonia gas
7.7 moles of hydrogen will produce:
(7.7moles×2)/3
77/15 moles
1 mole of ammonia gas has a mass of 14+3=17
since the mass of an atom of nitrogen is 14 while that of hydrogen atom is 1.
Therefore 77/15 moles will have a mass of
77/15 moles × 17=87.27 grams
How many moles are in 240g of CaCO3?
Using the periodic table, find the molar mass of each compound in CaCO3
CA = 40
C = 12
O = 16
Molecular Mass = 40 + 12 + (16 x3) = 100 grams.
Number of moles = given mass / molecular mass
Number of moles = 240 g / 100g = 2.4 moles
What is the formula for calcium fluoride
Answer:
[tex]CaF_{2}[/tex]
Explanation:
Calcium = Ca
Fluorine = F
Answer:
CaF2
Explanation:
a substance is classified as an electrolyte because
Answer:
It can conduct electricity when dissolved
Explanation:
Final answer:
A substance is classified as an electrolyte if it dissolves in water to produce a solution that can conduct electricity due to the presence of ions. Strong electrolytes dissociate completely, whereas weak electrolytes only partially dissociate.
Explanation:
A substance is classified as an electrolyte because it produces electrically conducting solution when dissolved in water or another polar solvent. Such substances undergo either a physical or a chemical change that yields ions in solution, which are then able to move and conduct electricity. Nonelectrolytes, on the other hand, do not yield ions when dissolved.
There are also distinctions between strong electrolytes and weak electrolytes. A strong electrolyte dissociates completely into ions, leading to high conductivity, whereas a weak electrolyte only partially dissociates, resulting in lower conductivity. Thus, the strength of electrolytes is related to the efficiency of the ion-producing process when the substance is dissolved in a solvent like water.
What is the force of attraction that holds atoms together?
Strong chemical bonds are the intramolecular forces that hold atoms together in molecules. A strong chemical bond is formed from the transfer or sharing of electrons between atomic centers and relies on the electrostatic attraction between the protons in nuclei and the electrons in the orbitals.
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The atoms are primarily held together by strong nuclear forces and electromagnetism. The strong nuclear force binds the particles in the nucleus, while electromagnetism acts on a larger scale, holding atoms together, especially in covalent bonds. Other forces like dispersion forces also play a role when molecules are very close.
Explanation:Atoms are held together by a few different forces, with the main two being the strong nuclear force and electromagnetism. The strong nuclear force keeps the particles of the nucleus, the nucleons, tightly bound together. This force is very strong, but it falls to zero over a distance of only 10-¹5 meters.
On the other hand, electromagnetism, which includes both magnetic and electrical forces, holds the atoms together at a larger scale. These forces occur between the positive charge of the atomic nucleus and the negatively charged electrons surrounding it. This is especially evident in covalent bonds where pairs of atoms share electrons.
Another type of force, although weaker, are dispersion forces that develop between atoms in different molecules when the molecules are very close.
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What is a goal of the planned mission MIRI?
A. to land on the moon
B. to explore the Kupier Belt
C. to explore the moon of Jupiter
D. to examine asteroids near Mars
Answer Please
Answer:
to explore the Kupier Belt
Explanation:
just finished the test
Goal of the planned mission MIRI is "to explore the Kupier Belt".
Explanation:
MIRI, Mid-infrared Instrument, was designed to play an important role in NASA's "James Webb Space Telescope"(JWST).This is a joint project involving the Space Agency Europe and Canada. This telescope is designed to bring the images of stars and galaxies in infrared light. This grasps a wavelength of 5 to 28 microns. It also has a sensitive dectector allowing to see the red shifted light, stars that are newly formed and the comet that are blur.
Also, to explore the Kuiper belt that is located in the outer solar system that extends from the Neptune to sun. It is believed to be similar to asteroid belt but 20 times broad and 200 times massive than it.
1. Name three alkanes and state a use for each.
2.(a) Explain what is meant by
(i) a saturated hydrocarbon (ii) an unsaturated hydrocarbon.
(b) Consider this list of hydrocarbons:
butane, ethene, octane, methane, butene
Name the hydrocarbons which are
(i) saturated,
(ii) unsaturated.
1. The simplest alkane is the gas methane, whose molecular formula is CH4. Methane exists as a tetrahedral shape, but it is often represented by a flattened structure as are most organic compounds.
Two four-carbon alkanes are known, and they have measurably different chemical and physical properties. Their structures are H3CCH2CH2CH3 and H3CCH(CH3)2. Therefore they were named normal butane, often abbreviated as n-butane, and isobutane. The straight-chain form is considered the "normal" form. Alternatively, they could be named using the systematic IUPAC method as 1-methylpropane and 2-methylpropane, or even as butane and 2-methylpropane. The IUPAC method names the longest straight carbon chain in the usual way and then numbers the carbons; the location of a substituent group is given by the number of its carbon. The IUPAC method is always used for more complicated molecules, but many of the simpler ones still use non-systematic names, called trivial names, because these are less cumbersome to use.
2 . Unsaturated hydrocarbons are hydrocarbons that have double or triple covalent bonds between adjacent carbon atoms. The term "unsaturated" means more hydrogen atoms may added to the hydrocarbon to make it saturated: consisting all single bonds.
Dont know 3. Sorry!
what is the most common mineral group in the earths crust
Answer:
The silicates
Explanation:
The silicates are the most common mineral groups on the earth crust. They account for a bulk 90% of all rocks and earth materials we find on our thin crust.
The silicates are made of the fundamental unit which is the SiO₄⁴⁻ tetrahedron. This forms the basic unit through which other elements combine with them. The silicates makes up the bulk of sands we have as silica.
The tetrahedron makes silicates unique and able to combine readily with other elements to form a wide range of minerals.
Most rocks found on the earth surface and in the crust are for their most parts made up of silicate minerals. Some of these minerals are olivine, quartz, beryl, phlogopite, feldspars etc.
At constant temperature, 534 mL of a gas at 894 torr is compressed to 167 mL What is the new pressure in atmospheres?
Answer:
3.762 atm.
Explanation:
We can use the general law of ideal gas: PV = nRT.where, P is the pressure of the gas in atm.
V is the volume of the gas in L.
n is the no. of moles of the gas in mol.
R is the general gas constant,
T is the temperature of the gas in K.
If n and T are constant, and have different values of P and V:(P₁V₁) = (P₂V₂)
Knowing that:
P₁ = 894.0 torr, V₁ = 534.0 mL,
P₂ = ??? torr, V₂ = 167.0 mL.
Applying in the above equation(P₁V₁) = (P₂V₂)
∴ P₂ = (P₁V₁)/V₂ = (894.0 torr)(534.0 mL)/(167.0 mL) = 2859 torr.
To convert from torr to atm:1.0 atm = 760.0 torr.
∴ P₂ = (2859 torr)(1.0 atm/760 torr) = 3.762 atm.
which mineral group dose copper belong
Answer:
Native Elements; Metallic Elements
Explanation:
Explain the fundamental steps of the scientific method.
Final answer:
The scientific method is a structured process used by scientists to explore observations by proposing questions, forming hypotheses, testing them through experiments, and analyzing results to form conclusions.
Explanation:
The scientific method is a process scientists use to understand the world. It consists of several steps:
Start by making an observation that evokes curiosity or raises a question.Propose a question stemming from the observation.Conduct research to see what is already known.Create a hypothesis, which is an educated guess that answers your question.Test the hypothesis through experimentation, ensuring that results are measurable and repeatable.Collect data during the experimentation and analyze it to support or refute the hypothesis.Form a conclusion based on the analysis, and integrate the findings with existing knowledge.If the hypothesis is supported, it may become a theory. If not, the hypothesis can be revised or a new one can be proposed. This process is cyclical, not linear, because it often leads to new questions and additional experiments.
At its core, the scientific method is about testing ideas with evidence. Good hypotheses should be testable and predictions made from these should be verifiable through experiments. The scientific method is not a rigid formula, but a flexible process that can adapt as new observations and technologies emerge.
what do scientist think caused the mass extinction of dinosaurs
Answer:
There are several theories to the extinction of the dinosaurs. One of the most supported ones are the impact of a meteor near Mexico that caused ashes to enter the atmosphere. These ashes led to a decrease in global temperature since it prevented sunlight from entering. There are many different minor theories that aren't as backed up as the meteor one.
About 65.5 million years ago was the start of the end of the age of the dinosaur. We know now that there was a meteor strike that happened 65.5 million years ago in Latin America and most scientists believe that or that plus a few other things is was initiated the collapse of the age of the dinosaur and initiated the rise of mammals which then leads to us. So 65.5 million years ago, there was an extinction event which scientists believe it was a meteor.
It most likely didn't kill all the dinosaurs immediately. It most likely altered the atmosphere and possibly caused a couple thousand years of a nuclear winter where the sun was blocked out if you can imagine that in your head.
The meteor was about 6 miles wide which doesn't sound like a lot to cause a mass extinction like this but it happened. So that large object striking the earth caused this havoc.
We know when this happened and where it happened.
Years ago, geologists started to notice that there was a thin layer almost like a layer of icing that existed in the same age all over the earth. Now, there is an element called iridium and it doesn't exist on earth. It only exists in outer space and so it had to be brought here and the thought is that this meteor mainly added this element and when it hit, it dispersed and it left this layer all over our planet so it's almost a fingerprint. So we know that this layer exists at 65 million years everywhere on earth and that's associated with this meteor.
The meteor hit in Latin America. The Gulf of Mexico is a meteor crater and that's where it hit and it hit about half on land and half in water.
If that didn't happen, there is a highly likelihood that dinosaurs would still be here. There is no reason why they wouldn't be and they would have evolved in any way they could have evolved in 65 million years and would still be here. However, mammals wouldn't be here.
How many quarters are in $500
Answer:
[tex]\boxed{2000}[/tex]
Explanation:
[tex]\text{4 quarters = \$1}\\\\\text{No. of quarters} = \text{\$500} \times \dfrac{\text{4 quarters}}{\text{\$1}} = \boxed{\textbf{2000 quarters}}[/tex]
How many moles of NaCl could be made by combining 20,000 moles of Na with 2 moles of CI?
a 20,000 moles Naci
2 moles Naci
b. 1 mole NaCl
None of the above
Please select the best answer from the choices provided
A
B
C
D
Answer:
None of the above.
Explanation:
The limiting factor of this is the chlorine. You only have 2 moles of chlorine.
2Na + Cl_2 ==> 2*NaCl
The equation tells you that for every mol of Cl2 that you have, you require 2 moles of Na and you get 2 moles of NaCl
So what that means is that if you have 2 mols of Cl2, you need just 4 moles of Na, and you will get 4 mols of NaCl
Since 4 is not one of your choices, the answer is none of the above
1. If we have a reaction of Zn3PO4 and HCl, what would the products of this
reaction be? If we produced 13.05 g of H3PO4, how many grams of
hydrochloric acid would be need to start with?
Answer:
1. The products of this reaction are ZnCl₂ and H₃PO₄.
2. 14.57 g.
Explanation:
1. What would the products of this reaction be?
The balanced reaction between Zn₃(PO₄)₂ and HCl is represented as:Zn₃(PO₄)₂ + 6HCl → 3ZnCl₂ + 2H₃PO₄,
It is clear that 1.0 mol of Zn₃(PO₄)₂ reacts with 6.0 mol of HCl to produce 3.0 mol of ZnCl₂ and 2.0 mol of H₃PO₄.
So, the products of this reaction are ZnCl₂ and H₃PO₄.
2. If we produced 13.05 g of H₃PO₄, how many grams of hydrochloric acid would be need to start with?
Firstly, we should get the no. of moles (n) of 13.05 grams of H₃PO₄:n = mass/molar mass = (13.05 g)/(97.994 g/mol) = 0.1332 mol.
Using cross-multiplication:
6.0 mol of HCl needed to produce → 2.0 mol of H₃PO₄, from stichiometry.
??? mol of HCl needed to produce → 0.1332 mol of H₃PO₄.
∴ The no. of moles of HCl needed = (6.0 mol)(0.1332 mol)/(2.0 mol) = 0.3995 mol.
∴ The mass of HCl needed = n*molar mass = (0.3995 mol)(36.46 g/mol) = 14.57 g.
So, the grams of hydrochloric acid would be need to start with = 14.57 g.
Paraffins are the simplest _______ series, where the difference between each member of the series is a simple structural unit. A. aliphatic B. ketone C. homologous D. aromatic
Paraffins are the simplest homologous series, where the difference between each member of the series is a simple structural unit.
C. Homologous
Paraffins:It is also referred to as alkanes, are saturated compounds that have the general formula [tex]C_nH_{2n+2}[/tex], where n is the number of carbon atoms. The simplest alkane is methane ([tex]CH_4[/tex]), which is also represented as C-1. Normal paraffins are unbranched straight-chain molecules. It could be the number of monomers in a homo-polymer such as amylose.
Thus, correct option is C.
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Use C8H18 as the formula for gasoline and 0.71g/mL as its density. If a car gets 31.2 miles per gallon, what volume of CO2 measured at 28°C and 732 torr is produced on a trip of 235 miles? Assume complete combustion of gasoline.
Answer:
[tex]\boxed{\text{4.5 m}^{3}}[/tex]
Explanation:
Step 1. Calculate the volume of gasoline used.
[tex]V = \text{235 mi} \times \dfrac{\text{1 gal}}{\text{31.2 mi}} \times \dfrac{\text{3.875 L}}{\text{1 gal}} = \text{28.51 L}[/tex]
Step 2. Calculate the moles of octane used.
[tex]n = \text{28.51 L} \times \dfrac{\text{1000 mL}}{\text{1 L}} \times \dfrac{\text{0.71 g}}{\text{1 mL}} \times \dfrac{\text{1 mol}}{\text{114.23 g}} = \text{177 mol}[/tex]
Step 3. Calculate the moles of CO₂ formed
C₈H₈ + 10O₂ ⟶ 8CO₂ + 4H₂O
n/mol: 177
[tex]n = \text{177 mol C$_8$H$_8$} \times \dfrac{\text{8 mol CO$_2$}}{\text{1 mol C$_8$H$_8$}} = \text{1420 mol CO$_2$}[/tex]
Step 4. Calculate the volume of CO₂
[tex]p =\text{732 torr} \times \dfrac{\text{1 atm}}{\text{760 torr}} = \text{0.9632 atm}[/tex]
R = 0.082 06 L·atm·K⁻¹mol⁻¹
T = 28 °C = 301.15 K
[tex]pV = nRT\\\\V = \dfrac{nRT}{p}\\\\V =\dfrac{177 \times 0.08206 \times 301.15}{0.9632} = \text{4500 L = 4.5 m}^{3}\\\\\text{The volume of CO$_2$ released is }\boxed{\textbf{4.5 m}^{\mathbf{3}}}[/tex]
Spontaneous decay of certain elements in nature occurs because these elements have
A. disproportionate ratios of electrons to protons
B. disproportionate ratios of neutrons to protons
C. low reactivity with oxygen
D. high reactivity with oxygen
Please Answer ASAP!!
Answer:
B.
Explanation:
The neutron/proton ratio for a certain element must fall within a certain range for the element to be stable. That’s why some isotopes of an element are stable and others are radioactive.
Spontaneous decay of certain elements in nature occurs because these elements have disproportionate ratios of neutrons to protons. Thus, option B is correct.
What is radioactive decay?Radio active decay is a process in which unstable nuclei will convert into stable nuclei by the emission of some particles in the form of radiations.
Unstable nature of nuclei is due to the presence of inappropriate ratio of neutrons to protons inside the nucleus. So these type of molecules shows spontaneous decay to attain stability.
Hence, the reason is the disproportionate ratios of neutrons to protons. Thus, option B is correct.
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• Describe how ultrasound and infrasound are used in specific industrial applications and provide detailed examples.
Ultrasound is sound or vibrations, having an ultrasonic frequency, particularly as used in medical imaging. Ultrasound is more commonly used in medical terminology than in industry. Infrasound is sound waves with frequencies below the lower limit of human audibility.
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A flask contains a gas mixture of hydrogen, nitrogen and methane. The total
pressure of the mix is 3.0 atm. The partial pressure of the hydrogen is 0.5
atm, and the partial pressure of the methane is 1.5 atm. What is the partial
pressure of the nitrogen?
OA) 0.8 atm
OB) 1.0 atm
OC) 1.6 atm
OD) 2.0 atm
Answer:
1 Atm
Explanation:
Dalton's law
The total pressure is 3 Atm so all you have to do is subtract the other partial pressures from 3
Answer:
OB) 1.0 atm
Explanation:
we have a mixture of hydrogen, nitrogen and methane and we have the following data
[tex]P_t= 3.0 atm[/tex]
[tex]P_H=0.5atm\\P_{CH_4}=1.5 atm\\P_N=?[/tex]
According to the law of Dalton the sum of the partial pressures of each gas is equal to the total pressure
Total pressure equation
[tex]P_t=P_H+P_{CH_4}+P_N[/tex]
now we clear the partial pressure of nitrogen from the equation
[tex]P_t=P_H+P_{CH_4}+P_N\\P_t-P_H-P_{CH_4}=P_N\\3amt-0.5atm-1.5atm=P_N\\1atm=P_N[/tex]
the partial pressure of nitrogen is 1 atm
the correct answer is OB) 1.0 atm
The amino acids are combinations of
ketones and alcohol
organic acid and amines
organic acid and esters
esters and aldehydes
Answer: The correct answer is: [B]:
_________________________________________________
" organic acid and amines " .
_________________________________________________
Note: Choice B: "organic acid and amines" ;
is the only answer choice that contains "amines" (hint: amino acid / amine) ; which are "proteins" .
As such; Choice "B" is the only correct answer choice.
_____________________________________________________
Hope this helps!
Best wishes to you!
_____________________________________________________
Answer: option B
Explanation:
Amino acids have both COOH and NH2 groups.
Example, Glycine -NH2CH2COOH
Hence amino acids are the combination of organic acids and amine.
Amino acids are building blocks of proteins.
Which of the following is not an indication of chemical change ?
A.fracture formation b.precipitate formation
C.gas production
D.energy transfer
Answer:
I think it is A.
Explanation:
Hope my answer has helped you!
Which type of reaction occurs in the following equation?
3CIO (aq) →→ CIO, (aq) + 2Cl(aq)
an oxidation reaction
a reduction reaction
a synthesis reaction
a disproportionation reaction
Answer:
The right choice is → a reduction reaction
Explanation:
From the balanced equation
3CIO⁻₍aq₎ → CIO⁻ ₍aq₎ + 2Cl⁻ ₍aq₎we can calculate the change in oxidation number of Cl in reactant and product
in reactant ClO⁻
let x= oxidation number of Cl
and oxidation number of oxygen in its compound is (-2)
and the total charge on the ClO⁻ ion = -1
∴x + (-2) = -1 →→→ x = +1in product Cl⁻
let x= oxidation number of Cl
and the total charge on the Cl⁻ ion = -1
∴x = -1so the oxidation number of Cl decreases from +1 in reactant to -1 in product so it is reduction reaction.
But, disproportionation reaction is defined as the chemical reaction in which a single substance gets reduced as well as oxidized.
For a disproportionated substance , it should contain at least three oxidation states. which isn't the case here.
So, the right choice is:
→ a reduction reaction
Answer:
disproportionation reaction
Explanation:
Which of the elements shown has an atomic mass of 20 amu?
Neon has atomic mass of 20
Answer:
they are right its neon but i have the same questions so just search up "neon bohr modle" so you know which answer it is.
Explanation: