What volume (in mL) at STP will be occupied by 0.0035 mol of methane,CH4?

Answer 1

well you would do

0.0035 moles CH4 x 22.4 L CH4 divided by 1 mole CH4 x 1000 mL CH4 divided by 1 liter

and using dimensional analysis, your answer should be in mL of CH4

Answer 2

I think someone told you how to work this when you asked it a few minutes ago. Check your earlier question.

I think it's best to used the ideal gas law to calculate your answer.