1.

Calculate the number of moles and molecules presentin 0.032 mg of methane (C 12, H-1)

Answer»

The molar mass of methane (CH4) is 12+4*1 = 16gm

so, in one moles the mass is 16gm = 16000mg

now we are given 0.032 mg

so, no. of moles will be 0.032/16000 = 2× 10^-6 moles.


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