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प्रश्न
What is the mass of 0.2 mole of oxygen atoms ?
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उत्तर
Given mass of oxygen = 0.2 moles
Gram atomic mass of oxygen atom = 16g
Therefore, 16g of oxygen atoms = 1 mole of oxygen atoms
So, 0.2 moles of oxygen atoms = 16 × 0.2g of oxygen atoms
Hence, 0.2 moles of oxygen atoms weigh 3.2g.
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