Calculate the number of moles in 45.0 g of N₂, and the pressure that it would exert at 20.0 $\degree$C in a 5.00 L steel tank.

Question

Quizplus · Accepted Answer

1) Calculate the number of moles: n = m/MW (where MW is the molecular weight of N₂) n = 45.0 g / 279.3 g/mol n = 0.161 mol 2) Use the ideal gas law to solve for pressure: PV = nRT P = nRT/V P = (0.161 mol) (0.08206 L·atm/(mol·K)) (20.0+273.15 K) / (5.00 L) P = 7.74 atm Therefore, the answer is B, 1.61 mol and 7.74 atm.

Calculate the Number of Moles in 45 °\degree° C in a 500 L Steel Tank

Calculate the Number of Moles in 45 $\degree$ C in a 500 L Steel Tank