calculate the number of the hydrogen atom in 0.8 moles of hydrogen molecules
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No. of molecules of H2 in 1 mole = 6.022 × 10^23
No. of molecules of H2 in 0.8 moles = 6.022 × 10^23 × 0.8 = 4.8176 × 10^23
No. of atoms in 1 hydrogen molecule = 2
No. of atoms in 0.8 mole hydrogen molecules = 2 × 4.8176 × 10^23 =
9.6352×10^23 atoms
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