if one mole of oxygen atom weighs 16 g, find mass of one atom of oxygen in gram
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Answer: mass of 1 atom of Oxygen is 2.65 × 10⁻²³ g
1 mole of O = 16g
6.022 × 10²³ atoms of O weigh 16g
∴ mass of 1 atom of O =
16 ÷ 6.022 × 10²³
= 2.65 × 10⁻²³ g
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