Question

A container has 21.5L of helium gas at a pressure of 245 kPa and a temperature

of 315K. How many moles of helium are in the container?

Answer 1

There are 2, 01 moles of helium in the container

Step-by-step explanation:

We use the formula PV=nRT. We convert of pressure the unit kPa into atm:

101,325 kPa---1 atm

245 kPa ----x= (245 kPa x 1 atm)/101,325 kPa=2,42 atm

PV= nRT ---> n=PV/RT

n= 2, 42 atm x 21, 5 L/ 0,082 l atm /K mol x315K

n=2, 012620871 mol