How many grams are in 4.35 moles of Ar?

1 Answer
Mar 3, 2016

Answer:

Approx. #170# #g#.

Explanation:

Argon has a mass of #39.95# #g*mol^-1#. If there are 4.35 mol, then the mass is simply #4.35# #molxx39.95*g*mol^-1#. Note that as an inert gas, we quite properly assume that argon is atomic. What assumption would we make if the gas had been oxygen or nitrogen?