# If an ideal gas has a pressure of 7.05 atm, a temperature of 379 K, and has a volume of 54.75 L, how many moles of gas are in the sample?

##### 1 Answer

Apr 8, 2017

#### Answer:

by using ideal gas equation

#### Explanation:

ideal gas equation :

P : pressure

V : volume

n : moles of gas

R : universal gas constant

T : temperature

R has different values for in different units

R = 8.314 J/mol-k

R = 0.0821 L-atm/mol-k

and so on.

here we will use R = 0.0821 L-atm/mol-k

now substitute given values in ideal gas equation

n = 12.4 mol