Respuesta :

If the density of a gas is 1.2g/l at 745 torr and 20 degree C, then the molar mass of gas is 30 g/mole.

What is ideal gas equation?

Ideal gas equation gives idea about the behavior of gas at different condition & represented as:

PV = nRT, where

  • P = pressure = 745 torr
  • V = volume = 1L
  • n = moles = ?
  • R = universal gas constant = 62.36 L.Torr / K.mol
  • T = temperature = 20 degree C = 293K

On putting all these value in the above equation, we get moles

n = (745)(1) / (62.36)(293) =  0.04 mole

Molar mass will be calculate by using the below equation:

M = W/n, where

  • W = given mass = 1.2g
  • n = moles = 0.04 mol

M = 1.2 / 0.04 = 30g/mol

Hence required molar mass of gas is 30g/mol.

To know more about ideal gas equation, visit the below link:

https://brainly.com/question/15882021

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