Molar volume, STP

Question

Use the molar volume of a gas at STP to the determine the volume (in L) occupied by 15 g of neon at STP

Answer 1

The molar volume of a gas at STP = 22.4 L

atomic mass of neon = 20.18 g

moles of neon = 15 g x 1 mol/20.18 g = 0.743 moles neon

volume of neon in liters = 0.743 moles x 22.4 L/mole = 17 liters (2 sig. figs.)