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Question

What is the total number of electrons present in 1.6 g of methane?

A
6.023×1023
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B
16
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C
12.04×1023
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D
6.023×1024
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Solution

The correct option is A 6.023×1023
1 mole methane = 16 g
Electrons in 1 mole of methane are =6+4×1=10
Mole of methane in 1.6 g=massmolar mass
=1.616=0.1 mole
0.1 mol methane contains 0.1×10mol electron=1 mole of electron
1 mole electron=6.023×1023 electrons

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