What volume does 2.25g of nitrogen gas, N2, occupy at 273 Celsius and 1.02 atm

0.126 Liters

Explanation:

V = mRT / mmP

First, convert the 2.25g of Nitrogen gas into moles. (m in the equation above)

2.25g x 1 mole / 28.0g = 0.08036 moles = m

28.0g = mm

Next, convert the 273 Celsius into Kelvin. (T in the equation above)

273 Celsius + 273.15 = 546.15K = T

R = 0.08206L*atm/mol*K

(Quick Note: The R changes depending on the Pressure Unit so do not use this number every time.)

Now, plug everything into the equation.

V = (0.08036) (0.08206) (546.15) / (28.0) (1.02)

V = 0.126 L