Hydrogen gas has a density of 0.09 , and at normal pressure and 1.01 one mole of it takes up 22.4. How would you calculate the moles in 770 of hydrogen gas?

Answer : The moles of hydrogen gas will be, 201.9 moles

Solution :

First we have to calculate the molar mass of hydrogen gas.

using ideal gas equation,

where,

n = number of moles of gas

w = mass of gas

P = pressure of the gas = 1 atm

T = temperature of the gas =

M = molar mass of hydrogen gas = ?

R = gas constant = 0.0821 Latm/moleK

D = density of gas  = 0.090 g/L

Now put all the given values in the above equation, we get the molar mass of hydrogen gas.

Now we have to calculate the moles of hydrogen gas.

Therefore, the moles of hydrogen gas is, 201.9 moles

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