Question

A 25.0 L tank contains hydrogen (H2) gas at a temperature of 149 K and a pressure of 1.51 atm. How many moles of hydrogen gas is in the tank?

Answer 1

There are 3.08 moles of hydrogen gas in the tank

Step-by-step explanation:

As we know

`PV = nRT`

where P is the pressure of the gas in atm

V is the volume in liters

n is the number of moles

R is the gas constant = 0.08206 L·atm/K·mol

and T is the temperature in Kelvin.

Substituting the given values in above equation, we get -

`1.51 * 25 = n * 0.08206 * 149\\n = 3.08`

There are 3.08 moles of hydrogen gas in the tank