2. A sample containing 1.80 mol of argon gas has a volume of 10.00 L. What is
the new volume of the gas, in litres, when each of the following changes occurs in
the quantity of the gas? Assume that pressure and temperature remain constant.
The changes are not cumulative. T
(a) An additional 1.80 mol of argon gas is added to the container. [ans: 20.0 L]
(b) A sample of 25.0 g of argon gas is added to the container. [ans: 13.5 LJ
(c) A hole in the container allows half of the gas to escape. [ans: 5.00 L]
3. A balloon that contains 4.80 g of carbon dioxide gas has a volume of 12.0 L. Assume
that the pressure and temperature of the balloon remain constant. What is the new
volume of the balloon if an additional 0.50 mol of CO₂ is added? [ans: 67 L]
Answers
Answer:
Hi goodmorning
The total volume of the gas is then 12.0 L + 0.806 L = 12.806 L.
To answer these questions, you can use the ideal gas law, which relates the pressure, volume, temperature, and number of moles of a gas. The ideal gas law is given by the following equation:
PV = nRT
Where P is the pressure of the gas, V is the volume of the gas, n is the number of moles of the gas, R is the ideal gas constant, and T is the temperature of the gas.
If pressure and temperature remain constant, then the volume of the gas will change inversely with the number of moles of the gas. This means that if the number of moles of the gas increases, the volume of the gas will decrease, and if the number of moles of the gas decreases, the volume of the gas will increase.
For example, in part (a), the number of moles of argon gas in the container increases by 1.80 mol, so the volume of the gas will decrease. The new volume of the gas can be calculated as follows:
V = (nRT)/P
= (1.80 mol * 8.31 J/mol*K * 300 K)/(1 atm)
= 4452 J
= 4.452 L
The total volume of the gas is then 10.00 L + 4.452 L = 14.452 L.
In part (b), the number of moles of argon gas in the container increases by a certain amount, which you can calculate using the molar mass of argon. The molar mass of argon is 39.948 g/mol, so the number of moles of argon in 25.0 g of argon is 25.0 g / 39.948 g/mol = 0.625 mol. The new volume of the gas can be calculated as follows:
V = (nRT)/P
= (0.625 mol * 8.31 J/mol*K * 300 K)/(1 atm)
= 1478.125 J
= 1.478 L
The total volume of the gas is then 10.00 L + 1.478 L = 11.478 L.
In part (c), the number of moles of argon gas in the container decreases by half, so the volume of the gas will increase. The new volume of the gas can be calculated as follows:
V = (nRT)/P
= (0.9 mol * 8.31 J/mol*K * 300 K)/(1 atm)
= 2463.9 J
= 2.464 L
The total volume of the gas is then 10.00 L + 2.464 L = 12.464 L.
In part (d), the number of moles of CO2 gas in the balloon increases by 0.50 mol, so the volume of the gas will decrease. The molar mass of CO2 is 44.01 g/mol, so the number of moles of CO2 in 4.80 g of CO2 is 4.80 g / 44.01 g/mol = 0.109 mol. The new volume of the balloon can be calculated as follows:
V = (nRT)/P
= (0.109 mol + 0.50 mol) * 8.31 J/mol*K * 300 K)/(1 atm)
= 806.36 J
= 0.806 L
Related Questions
what’s is the answer?
Answers
The energy of the photon of light can be obtained as 6.27 * 10^-20 J.
What is the energy of the photon?We know that a photon has to to do with a particular unit of light. We know that light can be said to be composed of very tiny corpuscles and these corpuscles of light is what we call the photon of the light.
We can be able to us the equation that is derived by Max Plank to be able to get the value of the energy of the photon of light. Now we know that a photon of light can have an energy that is able to be obtained by;
E = hf
h = Plank's constant
f = Frequency
Then;
E = 6.6 * 10^-34 Js * 9.5 * 10^13 Hz
= 6.27 * 10^-20 J
Thus as we can see from the parameters in the question, the energy of the photon is 6.27 * 10^-20 J.
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Sulfur (S) has an atomic number of 16. What is the ground-state electron configuration of sulfur?
Answers
Which of the following is a homogeneous mixture ?A.pizza B.oxygen
C.tea
D .pure water
Answers
I think it would be d bc water is everywhere
Metal plating is done by passing current through a metal solution. For example, an item can become gold plated by attaching the item to a power source and submerging it into a Au3 solution. The item itself serves as the cathode, at which the Au3 ions are reduced to Au(s). A piece of solid gold is used as the a node and is also connected to the power source, thus completing the circuit.
Required:
What mass of gold is produced when 15.0A of current are passed through a gold solution for 15.0min ?
Answers
Answer:
9.18g
Explanation:
Step 1: Write the reduction half-reaction
Au³⁺(aq) + 3 e⁻ ⇒ Au(s)
Step 2: Calculate the mass of gold is produced when 15.0A of current are passed through a gold solution for 15.0min
We will use the following relationships:
1 min = 60 s1 A = 1 C/s1 mole of electrons has a charge of 96486 C (Faraday's constant).1 mole of Au is produced when 3 moles of electrons circulate.The molar mass of Au is 196.97 g/mol.The mass of gold produced is:
\(15.0 min \times \frac{60s}{1 min} \times \frac{15.0C}{1s} \times \frac{1 mol e^{-} }{96486C} \times \frac{1molAu}{3 mol e^{-} } \times \frac{196.97gAu}{1molAu} = 9.18gAu\)
Select the true statements about SDS‑PAGE, a method of separating proteins. Assume that SDS‑PAGE is performed under reducing conditions.
a. Proteins are separated in a polyacrylamide gel matrix.
b. Protein‑SDS complexes have similar mass to charge ratios; therefore, separation is by size.
c. Proteins are visualized using a dye that binds to the gel matrix, but not to proteins.
d. Smaller proteins migrate faster through the polyacrylamide gel.
e. Sodium dodecyl sulfate binds proteins, resulting in protein‑SDS complexes that are similar in size.
f. Protein‑SDS complexes migrate toward the negative electrode.
Answers
A solid substance was tested in the laboratory. The test results are listed below: 1.) dissolves in water 2.) is an electrolyte 3.) melts at a high temperature. Based on these results, the solid substance could be
Answers
Answer:
NaCl may be i guess so....
Once you pour the boiling water into the beaker, why is it important to wait a while before you measure the reading on the thermometer?
Answers
A pregnant client experienced preterm labor at 30 weeks gestation. Upon assessing the client the nurse finds that the newborn is at risk of having cerebral palsy. Which medication administration should the nurse perform to prevent cerebral palsy in the newborn?
A. Calcium gluconate.
B. Magnesium sulfate.
C. Glucocorticoid drugs.
D. Antibiotic medications
Answers
The medicine that has to be given by the nurse to prevent cerebral palsy in the new-born is magnesium sulphate.
The term "cerebral palsy" refers to a collection of conditions that impair mobility and posture development and are thought to be caused by non-progressive abnormalities. Insults that caused cerebral palsy are thought to have happened during foetal development or early childhood. A significant risk factor for cerebral palsy is preterm delivery, and that risk rises sharply as gestational age decreases. Right now, 25% of all new occurrences of cerebral palsy are caused by babies delivered before 34 weeks of pregnancy. Cerebral palsy risk is higher when there are several pregnancies. MgSO4 was infused continuously at a rate of 2 g/h for up to 12 hours after a 6 g loading dose. Given before delivery, magnesium sulphate is known to regulate the vasculature and minimize hypoxia effects by neutralising cytokine or excitatory amino acid damage, which may lower the risk.
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How much heat do you need to raise the temperature of 150 g of gasoline from -30 degrees C to -15 degrees C? I cannot see the tinycurl
Answers
Cp = 2.22 J/g°C
m = 150 g
ΔT = T(final) - T(initial) = -15°C - (-30°C) = +15°C
q = (150 g)(2.22 J/g°C)(15°C) = 4,995 J
Answer:
5.00 kj
Explanation:
I took the test
Which of the following statements about atoms and
subatomic particles is true?
A. The nucleus of an atom has no mass.
B. Neutrons are negatively charged.
C. Electrons exist in the nucleus.
D. The nucleus makes up most of the mass of an atom.
E. A cation has more electrons than protons.
Modify each incorrect statement to make it correct.
Answers
statements about atoms and subatomic particles is true A cation has more electrons than protons.
Why is it called a subatomic particle?Protons, neutrons and electrons are all called subatomic particles because they are smaller particles that make up atoms. The prefix "sub" means beneath, or smaller. Since these particles are "sub"-atomic, this means they are smaller than atoms. Atoms have a nucleus made of protons and neutrons stuck together.
What are subatomic made of?Subatomic particles include electrons, the negatively charged, almost massless particles that nevertheless account for most of the size of the atom, and they include the heavier building blocks of the small but very dense nucleus of the atom, the positively charged protons and the electrically neutral neutrons.
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What do you call a way of acquiring knowledge through experiment?
a.Academic method C.Scientific method
b.Experimental method d.Scientific notation
Answers
Answer:B
Explanation:
Coulomb's Law yields an expression for the energy of interaction for a pair of point charges.
V=2.31E-19 Q1 Q2 /r (nm)
V is the energy (in J) required to bring the two charges from infinite distance separation to distance r (in nm).
Q1 and Q2 are the charges in terms of electrons.
(i.e. the constant in the above expression is 2.31×10-19 J nm electrons-2)
For a group of "point" charges (e.g. ions) the total energy of interaction is the sum of the interaction energies for the individual pairs.
Calculate the energy of interaction for the linear arrangement of ions shown in the diagram below.
d = 0.400 nm.
Answers
The energy of interaction for the linear arrangement of ions shown in the diagram below is 4.44 * 10⁻⁵⁸ J.
What is the total energy of interaction of the charges shown in the given arrangement?The total energy of interaction is the sum of the interaction energies for the individual pairs of ions.
The energy of interaction of the individual pairs is given below as follows:
V = 2.31 * 10⁻¹⁹ * Q₁ * Q₂ / r
where;
Q₁ = 1.602 * 10⁻¹⁹ coulombs.
Q₂ = 1.602 * 10⁻¹⁹ coulombs
r is the distance in nm
The total energy of interaction of the charges shown in the given arrangement will be 3V.
V = 2.31 * 10⁻¹⁹ * 1.602 * 10⁻¹⁹ * 1.602 * 10⁻¹⁹ / 0.4
V = 1.48 * 10⁻⁵⁸ J
3V = 4.44 * 10⁻⁵⁸ J
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How do we measure the weight or mass of something
Answers
Explanation:
We can measure the weight or mass of something by using beam balance.
hydrogen peroxide slowly decomposes into water and oxygen.the enthalpy change of reaction can be calculated using standard enthalpies of formation.Using a Hess cycle what is the enthalpy change of reaction for this decomposition
Answers
2. Which chemical below is easier to dissolve in water
a) KBr b) CO2 c)CH4
d) O2
Answers
The correct answer is a) KBr.
KBr is an ionic compound composed of a metal (K) and a non-metal (Br). When this compound is added to water, the polar water molecules surround the ions in the solid and separate them, which leads to the compound dissolving in water.
What is Ionic Compound?
An ionic compound is a chemical compound composed of ions held together by electrostatic forces called ionic bonds. Ions are atoms or molecules that have gained or lost one or more electrons, giving them a positive or negative charge. In an ionic compound, a positively charged ion (cation) and a negatively charged ion (anion) are attracted to each other to form a stable compound.
CO2, CH4, and O2 are nonpolar molecules, and therefore, do not dissolve well in water. CO2 and O2 are gases at room temperature and pressure, while CH4 is a gas at room temperature but can be liquefied under pressure.
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1pt Which particle is a neutron most equal to in mass?
A. a molecule
B. an atom
O c. a proton
OD. an electron
Answers
Answer:
c. a proton
Explanation:
A neutron is most equal in mass to a proton.
A neutron is a subatomic particle without any charges on them.
A proton is a subatomic particle with a positive charge.
the mass of a proton and neutron are the most similar in an atom. the mass of a proton is 1.67 x 10⁻²⁷kgSo also is the mass of a neutronthe mass of an electron is 9.11 x 10⁻³¹kgWhat is the mass of a 2.5 mole sample of MgO2
Answers
m = n x Mr
m = 2.5 mol x (24 + [16 x 2])
m = 140g
Select the options that correctly reflect the mass ratios and mass percentages of the elements in SO3
1. The mass ratio of S is .400
2. The mass percentage of O is 60%
Answers
The options "The mass ratio of S is .400 and The mass percentage of O is 60%" , Both are correct of the elements in sulfur trioxide (\(SO^3\))
The molecular formula of sulfur trioxide (\(SO^3\)) contains one sulfur atom and three oxygen atoms. To calculate the mass ratios and mass percentages of each element in \(SO^3\\\), we need to know the atomic masses of sulfur and oxygen:
Sulfur (S): 32.06 g/mol
Oxygen (O): 16.00 g/mol
Mass ratio of S:
The mass ratio of sulfur (S) in \(SO^3\\\) is the mass of sulfur divided by the total mass of the compound:
Mass ratio of S = mass of S / (mass of S + mass of O)
Mass ratio of S = \(32.06 g/mol / (32.06 g/mol + 3(16.00 g/mol))\)
Mass ratio of S =\(32.06 g/mol / 80.06 g/mol\)
Mass ratio of S = 0.400
Therefore, option 1 "The mass ratio of S is .400" is correct.
Mass percentage of O:
The mass percentage of oxygen (O) in \(SO^3\) is the mass of oxygen divided by the total mass of the compound, multiplied by 100%:
Mass percentage of O = (mass of O / total mass) x 100%
Mass percentage of O = \((3(16.00 g/mol) / (32.06 g/mol + 3(16.00 g/mol))) * 100%\)
Mass percentage of O = \(48.00 g/mol / 80.06 g/mol * 100%\)
Mass percentage of O = 59.97%
Rounding to one significant figure, the mass percentage of O in \(SO^3\\\) is 60%.
Therefore, option 2 "The mass percentage of O is 60%" is also correct.
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Help please I’ll mark as brainiliest
Answers
Answer:
B B
W BW BW
W BW BW
Explanation:
Hope this helps
A net force of 66 newtons accelerates a child at 2.0 m/s? down a smooth playground slide. What is the mass of the
child?
A 130 kg
B68 kg
© 64 kg
D 33 kg
Answers
Answer:The answer is D 33
Explanation:
The mass of the child accelerating at 2 m/s² by a net force of 66 N is 33 Kg (Option D)
Relationship between force and accelerationForce is related to acceleration according to the following equation
Force (F) = mass (m) × acceleration (a)
F = ma
With the above formula, we can obtain the mass of the child
How to determine the mass of the child Acceleration (a) = 2 m/s²Force (F) = 66 NMass (m) =?F = ma
66 = m × 2
Divide both side by 2
m = 66 / 2
m = 33 Kg
Thus, the mass of the child is 33 Kg
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What is the empirical formula of a compound that is 14.3% Nitrogen, 4.1% Hydrogen, and 81.6% Bromine?
Answers
The empirical formula of the compound with 14.3% Nitrogen, 4.1% Hydrogen, and 81.6% Bromine would be \(NH_4Br\).
Empirical formula calculationThe compound contains 3 atoms of different elements according to the following percentage:
Nitrogen (N) = 14.3%Hydrogen (H) = 4.1%Bromine (Br) = 81.6%Let's find the mole equivalent of each percentage:
Nitrogen = 14.3/14 = 1.02Hydrogen = 4.1/1 = 4.1 Bromine = 81.6/80 = 1.02Divide by the smallest mole:
Nitrogen = 1.02/1.02 = 1Hydrogen = 4.1/1.02 = 4Bromine = 1.02/1.02 = 1Thus, the empirical formula of the compound is \(NH_4Br\).
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Imagine a world in which all the elements existed, but they couldn't form any chemical bonds with eachother. What kinds of substances could exist in such a world? what kinds of substances could not exist? what do you think this world would be like?
Answers
Answer:
In a world where elements exist but are unable to form chemical bonds with each other, the most basic and purest form of elements would exist as individual atoms or ions. There would not be any molecules or compounds since the atoms would not be able to bind with each other.
Substances that could not exist in this world would be those that are composed of chemical bonds, such as gases, liquids, or solids. This would include common substances such as water, air, and most organic materials.
In this world, there would not be any reactions or chemical processes as the atoms would not be able to interact with each other. This would result in a world that is still and unchanging, with no movement or life. It would be a world of individual atoms and ions, floating aimlessly in a void. This world would be inhospitable to life and would not support any kind of chemical or biological processes.
Answer: All elements would just coexist and nothing would be created. This means that substances such as water, salt, etc. would not form. This world would have no life since chemical bonds would not be able to form.
Hope this helps or at least gets you started! Have a great day:)
Calculate the molecular mass of sulphur if 35.5 g of sulphur dissolves in 100.0 g of CS2 to produce a solution that has a boiling point of 49.48°C.
Answers
CAN SOMEONE HELP WITH THIS QUESTION?✨
IF A MIXTURE WEIGHTS 10.618 g and the mass of ammonium chloride in the mixture is found to be 0.942 g, WHAT IS THE PERCENT ammonium CHLORIDE IN THE MIXTURE?
Answers
The mixture contains 8.89% ammonium chloride.
Percent ammonium chloride = (mass of ammonium chloride / total weight of mixture) x 100
Percent ammonium chloride = (0.942 g / 10.618 g) x 100
Percent ammonium chloride = 8.89%
So, the mixture contains 8.89% ammonium chloride.
What is the amount?
The amount of substance (n) means the number of particles or elementary entities in a sample. It is also called the chemical amount. The unit for the amount of substance is the mole. An elementary entity is the smallest amount of a substance that can exist.
How do you find the percentage of a mixture in chemistry?
Find the molar mass of all the elements in the compound in grams per mole.Find the molecular mass of the entire compound.Divide the component's molar mass by the entire molecular mass.You will now have a number between 0 and 1. Multiply it by 100 to get the percent composition!To know more about percentage composition:
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Can someone please help? And quickly if you can thank you!
Answers
The concept ideal gas equation is used here to determine the number of moles. The ideal gas law is the equation of state of a hypothetical ideal gas. Here the number of moles of gas is 0.17.
The equation which is formed by the combination of Boyle's law, Charles's law and Avogadro's law is called the ideal gas equation. An ideal gas is a theoretical gas composed of a set of randomly moving point particles which interact through elastic collisions.
The ideal gas equation is:
PV = nRT
n = PV / RT
10°C = 283 K
Number of moles is:
n = 1.2 × 3.4 / 0.0821 × 283 = 0.17
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50 points
Which elemental family receives electrons in an ionic bond?
Responses
noble gases
metals
halogens
nonmetals
Answers
Answer: es no metales
Explanation:
Your little sister asks you a scientific question: "Does chocolate milk come from brown cows?" In order to answer the question, you decide to form a hypothesis.
Explain whether or not the following statements are effective hypotheses.
i. Brown cows produce chocolate milk.
ii. Brown cows never produce chocolate milk.
iii. Brown cows produce white milk.
Answers
A hypothesis is a proposed explanation or prediction based on limited evidence or observations, which can be tested through further investigation or experimentation. It should be specific, testable, and based on existing knowledge.
Now, let's evaluate each statement as a hypothesis:Brown cows produce chocolate milk.This statement can be considered an effective hypothesis as it proposes a relationship between the color of cows and the color of milk they produce. It is specific and testable, as one could observe and analyze the milk produced by brown cows to see if it is indeed chocolate milk. However, based on existing knowledge, we can confidently say that this hypothesis is not accurate, as the color of a cow does not determine the color of the milk it produces.Brown cows never produce chocolate milk.This statement can also be considered an effective hypothesis because it makes a specific claim that can be tested. However, based on existing knowledge, we can say that this hypothesis is not accurate. While the color of a cow does not determine the color of the milk, it is possible for chocolate milk to be produced by adding chocolate syrup or cocoa powder to regular white milk.Brown cows produce white milk.This statement is not an effective hypothesis as it is a general statement that aligns with existing knowledge. It does not propose any specific relationship or prediction to be tested. In the context of this question, the statement is not accurate as milk produced by cows is typically white, regardless of their coat color.For such more question on hypothesis
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1 webbed feet
2wing structure
3beaks
4 eye color
Answers
Explanation:
webbEd feeetttttt ...........
A mixture of 0.600 mol of bromine and 1.600 mol of iodine is placed into a rigid 1.000-L container at 350°C.
Br2(g) + I2(g) ↔ 2IBr(g)
When the mixture has come to equilibrium, the concentration of iodine monobromide is
1.190 M. What is the equilibrium constant for this reaction at 350°C? Show step-by step explanation.
A) 3.55 × 10^3
B) 1.24
C) 1.47
D) 282
E) 325
Answers
The equilibrium constant for this reaction at 350°C is D. 282.
Equilibrium constantA dynamic chemical system approaches chemical equilibrium constant when enough time has passed and its composition no longer exhibits any discernible propensity to change further. The equilibrium constant of a chemical reaction is the value of its reaction quotient in this condition. The equilibrium constant is independent of the initial analytical concentrations of the reactant and product species in the mixture for a specific set of reaction conditions. Understanding equilibrium constants is crucial for comprehending many chemical systems as well as biological processes like the transport of oxygen by hemoglobin in the blood and the maintenance of acid-base homeostasis in the human body. There are many different kinds of equilibrium constants, including stability constants, formation constants, binding constants, association constants, and dissociation constants.
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A mixture of 0.600 mol of bromine and 1.600 mol of iodine is placed into a rigid 1.000-L container at 350°C.
Br2(g) + I2(g) ↔ 2IBr(g)
When the mixture has come to equilibrium, the concentration of iodine monobromide is
1.190 M. What is the equilibrium constant for this reaction at 350°C? Show step-by step explanation.
A) 3.55 × 10^3
B) 1.24
C) 1.47
D) 282
E) 325
How much work in joules is done on the system when a 1.15 atm external pressure causes a piston to decrease in volume in volume from 6.55 Liters to 3.16 Liters ?
Answers
We have according to the statement a gas to which external pressure is exerted to reduce its volume. We will first assume that the process occurs at a constant temperature and pressure. The work done by that external force is determined by the following form of work (W):
\(W=-P\times\Delta V\)\(W=-P\times(V_2-V_1)\)Where,
P is the external pressure, 1.15atm
V2 is the final volume, 3.16L
V1 is the initial volume, 6.55L
We replace the known values:
\(\begin{gathered} W=-1.15atm\times(3.16L-6.55L) \\ W=3.8985atm/L \end{gathered}\)We will convert these units to joules. 1atm/L=101.325J.
\(W=3.8985atm/L\times\frac{101.325J}{1atm/L}=395J\)Answer: The work in joules done is 395 J