A certain mass of gas occupied 146cm'3 at 18''0c and 738mml 1g pressure , calculate its volume at stp?

Answer 1

You know that PV = kT
That is, PV/T remains constant. So, you want V such that
760V/273 = 738*146/(273+18)
V = 133 cm^3

You need to pay attention to your typing. That would be
146 cm^3
18°C
738mm Hg