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Mole Concept and Avogadro's Number

One mole of ...

Question

One mole of $C H_{4}$ contains:

4.0 g atoms of hydrogen

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3.0 g atom of carbon

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6.02 \times 10^{23}

atoms of hydrogen

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1.81 \times 10^{23}

molecules of

C H_{4}

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Solution

The correct option is A 4.0 g atoms of hydrogen
Methane gas is a gas whose formula is CH₄ that contains 1 mole of carbon and 2 moles of hydrogen.

As we know that 12 grams of pure carbon powder is equal to 1 mole. The number of carbon atoms present in this 1 mole is known as Avogadro’s number which is a constant whose value is 6.023×10²³.

According to the formula, 2 moles of Hydrogen is 2 times the relative molecular mass of Hydrogen which is 4 g. So, 1 mole of CH₄contains 4 g atoms of hydrogen.

Thus, option A is correct.

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