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Which of the following contains Avogadro number of atoms?

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one mole of Helium gas

22.4 lts of ${CO}_{2}$ at STP

11.2 lts of Hydrogen gas at STP

3.2 gms of methane

answer is A, C, D.

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Detailed Solution

1) 1 mole he Avogadro number of atom

2) 22.4 Lt of ${CO}_{2} = 3 mole atoms$

3) 11.2 Lt of $H_{2} = 0.5 mole H_{2} = 1$ mole(or)Avogadro's number atoms

4) $\frac{3.2}{1.6} = 0.2 m o l C H_{4} = 0.2 \times 5 = 1$ mole(or)Avogadro's number atoms

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