Question

Calculate the number of electron in 1.6g of methane.
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Answer 1

Answer:

Gram-molecular mass of methane =12+4=16g

Number of moles in 1.6g of methane =

1.6 ÷ 16 = 0.1 mol

Number of molecules of methane in 0.1 mole= 0.1×6.02×10²³

=6.02×10²²

One molecule of methane has 6+4=10 electrons

So,

6.02×10²³

molecules of methane have 10×6.02×10²³

=6.022×10²³ electrons