A 20.0 L tank contains 0.225 kg of helium at 18.0 C. The molar mass of helium is 4.00 g/mol. (a)How many moles of helium are in the tank?

A 20.0 L tank contains 0.225 kg of helium at 18.0 C. The molar mass of helium is 4.00 g/mol. (a)How many moles of helium are in the tank? (b)What is the pressure in the tank, in Pascals and in atmospheres? Take the Helium as an ideal gas.

0.225 kg of HeliumMolar mass of helium = 4gm/molNumber of moles of Helium = 0.225kg225 g== 56.25mol4 gm / mol 4 gm / mol T = 18 + 273 = 291 K V = 20 L = 0.020m3Using universal gas equation,...