Question

A sample of ammonia contains 0.500 mol. What volume at STP would the gas occupy?

Answer 1

To convert from moles to volume, you simply multiply the moles by 22.4 L. 

(.500 mol)(22.4L)= 11.2 L

A sample of ammonia would occupy 11.2 L at STP.

I attached a mole map. Hope that'll help you in the future.