What is the number of mols of hydrogen atoms in 3.2g of methane

What is the number of mols of hydrogen atoms in 3.2g of methane

Options

(a) 0.2
(b) 0.4
(c) 0.8
(d) 2

Correct Answer:

0.8

Explanation:

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  • No. Of moles= mass/ molar mass

    Molar mass of CH4 = 12+4(1)=16

    No of moles in CH4 = 3.2/ 16
    = 0.2mol
    So,
    No.of moles of H = 0.2 (4)
    = 0.8 mol

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