Question

A flask at room temperature contains exactly equal amounts (in moles) of nitrogen and xenon. (MM N2 = 28.01 g/mol, MM Xe = 131.3 g/mol) a. Which of the two gases exerts the greater partial pressure? BRIEFLY explain your answer. b. The molecules or atoms of which gas have a greater average speed? BRIEFLY explain your answer. c. If a small hole were opened in the flask, which gas would effuse more quickly? BRIEFLY explain your answer. d. The molecules or atoms of which gas have a greater kinetic energy? BRIEFLY explain your answer.

Answer #1

1) Solution-

Because the flask contains exactly equal amounts of both (in moles) of nitrogen and xenon, hence the partial pressure of the two gases will be the same.

b) Average velocity is inversely proportional to the molar mass the gas. .Therefore N2 will have the greater average speed.

c) Nitrogen because the molar mass is smaller than xenon

d) As we know that kinetic energy is directly proportional to the temperature. because the T is the same for both the gases, the average kinetic energy will be the same for both.

1/ 0.987 mol sample of xenon
gas at a temperature of 19.0 °C is found to occupy
a volume of 28.2 liters. The pressure of this gas
sample is .... mm Hg.
2/ A sample of nitrogen gas collected at a
pressure of 477 mm Hg and a temperature of
278 K has a mass of 20.0 grams.
The volume of the sample is ...... L.
3/ A 4.97 gram sample of carbon
dioxide gas has a volume of 856...

Question 1 .Solve all
a)How many moles of nitrogen, N, are in 90.0 g of nitrous oxide,
N2
c)Calculate the number of moles of magnesium, chlorine, and
oxygen atoms in 8.70 moles of magnesium perchlorate, Mg(ClO4)2.
d)A sample of propane, C3H8, contains 12.9 moles of carbon
atoms. How many total moles of atoms does the sample contain?
e)Caffeine is a bitter stimulant drug and is found in varying
quantities in seeds, leaves, and so on. Its formula is C8H10N4O2.
Match...

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