Answer:
N = PV/RT
Explanation:
PV = NRT
To make N the subject of the formula, divide both sides by it's obstacles which are RT. So divide both sides by RT.
PV/RT = NRT/RT
PV/RT = N
OR
N = PV/RT
Check/Verify
N = PV/RT
cross multiply
N(RT) = PV
NRT = PV
Hope this helps