Verified answer

ooh I love these questions in exams

it's basically just substituting it all in

first get rearrange pv=nrt to get n on it's own..

n=PV/RT

then simply substitute in your values...

n=(0.0477*15200)/(8.31*288)

(R will always be 8.31 unless stated otherwise.)

Bung that into your calculator and boom there's your answer

The ideal gas law turns into an algebra problem as long as you have the correct units. Remember n=# of moles of gas involved

Temperature must be in Kelvin so you have to use 288K

the universal gas constant (R) is 0.8206

you get 0.0477*15000=n*.08206*288

n= (0.0477*15000)/(.08206*288)

n = 30.275

So you have 30.275 moles of gas - depending upon significant figures