Weight of how many moles of helium is equal to the weight of 1 mole of oxygen molecule?
Molar mass of O2 = 32.
Molar mass of helium = 4
So 8 moles of helium weigh equal to 1 mole of oxygen.
How many moles of Helium weigh equal to the mass of 1 mole of Oxygen molecule?
How many moles of helium will have a mass equal to the mass of 1 mole of oxygen gas?
How many moles of electron weight one kg?