# What formula do i use here?

*label*Chemistry

*timer*Asked: Dec 10th, 2018

**Question description**

Hai! this is my first time using this haha

My question is "a perfect balloon has a temperature of 227 C a volume of 2.5 liters and contains 10 moles of gas. If the pressure remains constant what is the new volume if 2 moles of gas are released from the ballon and submerged in liquid nitrogen ( -73 C)"

I don't know what to do with the moles??? or what formula to use? PV=nRT maybe?????.... but P is constant??????