Question

What is the volume of 1.2 moles of oxygen gas (O2) at standard temperature and pressure (STP)?

Answer 1

Volume of O2 = 22.4 x moles of O2
= 22.4 x 1.2
= 26.88L

Answer 2

Answer: The volume of 1.2 moles of oxygen gas (
`O_2`) at standard temperature and pressure (STP) is 26.9 Liters

Step-by-step explanation:

Using ideal gas equation:

PV = nRT

`V=(nRT)/(P)`

At standard conditions of temperature and pressure:

P= pressure = 1 atm

T = temperature = 273 K

V= volume = ?

Given: n = no of moles = 1.2

R= gas constant =0.0821 Latm\molK

Putting in the values we get:

`V=(1.2* 0.0821Latm/Kmol* 273)/(1atm)=26.9L`

The volume of 1.2 moles of oxygen gas (
`O_2`) at standard temperature and pressure (STP) is 26.9 Liters