a. The atomic radii is the same for both argon and the unknown gas.

atomic radii is unique for each atom

b. The effusion rate is the same for both argon and the unknown gas.

different molar mass → different effusion rate

c. The number of moles is the same for both argon and the unknown gas.

number of moles can be equal

d. The temperature is the same for both argon and the unknown gas.

temperature can be equal

You may want to reference (Pages 404 - 407) Section 10.4 while completing this problem.

To estimate the molar mass of the unknown gas based on the molar mass of argon, which assumptions should be made?

a. The atomic radii is the same for both argon and the unknown gas.

b. The effusion rate is the same for both argon and the unknown gas.

c. The number of moles is the same for both argon and the unknown gas.

d. The temperature is the same for both argon and the unknown gas.

e. The pressure is the same for both argon and the unknown gas.

f. The volume is the same for both argon and the unknown gas.

g. The tendency to behave ideally is the same for both argon and the unknown gas.

h. The diffusion rate is the same for both argon and the unknown gas.

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What scientific concept do you need to know in order to solve this problem?

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