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प्रश्न
Find the weight of 0.2 mole of H2 gas.
उत्तर
Molecular mass of H2 = (1 × 2) = 2 g
Weight of 1 mole of hydrogen gas = 2 g
∴ Weight of 0.2 mole of H2 = 2 × 0.2
= 0.4 g
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