Question

How many moles of gas exist if it has a volume of 500 mL at 23 degrees Celsius and 23 psi?

Answer 1

Using Ideal Gas law, $PV=nRT \implies n=PV/RT$

$P=23psi= 23*0.068046 atm$

$V= 500 ml = 0.5 L$

$T=23^o C= 273+23=296 K$

$R= 0.0821 Latmmol^{-1}K^{-1}$

$\implies n = 23*0.068046*0.5/(0.0821*296)= 0.0322 mol$