Question

If 200cm3 of a gas at s.t.p has a mass of 0.268g. What is its molar mass? {M.V=22.4dm3}

Answer 1

Answer:

Explanation:

No of moles= Vol of gas given/ 22.4

                     = 0.2/22.4= 0.0089      (200 cm^3= 0.2L)

So no of moles = 0.0089

No of moles = Given mass/Molar mass

0.008 = 0.268/Molar mass

Molar mass= 0.268/0.0089= 30.11g/ mole

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