A: 6.02 × 1023 atoms of H

B: 4 g atom of Hydrogen

C: 1.81 × 1023 molecules of CH4

D: 3.0 g of carbon

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Explanation:

1 mole of CH4 has 1 mole of carbon atoms and 4 moles of hydrogen atoms.

As mass of 1 mole of hydrogen atoms is 1 gram 

So mass of  4 mole of hydrogen atoms is 4 grams.

Final Answer:

Hence, 1 mole of CH4 has 4 g atom of Hydrogen

Option B is correct

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