Calculate the mass of 1 molecule of oxygen gas. [ Atomic mas of O = 16 u, NA = 6.022 × 1023 −1 ]
Calculate the mass of 1 molecule of oxygen gas. [ Atomic mas of O = 16 u, NA = 6.022 × 1023 mol−1 ]
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Weight of 1 mole of oxygen molecules = 32g of oxygen
Number of atoms in 1 mole of oxygen = 6.022 × 1023 molecules
Because 6.022 × 1023 molecules of O2 weigh 32 g
Therefore, 1 molecule of O2 will weigh = 32/ 6.022×1023 = 5.313 × 10−23 g
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