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Calculate the mass of 1 molecule of oxygen gas.[Atomic mass of O = 16 u and NA = 6.022 x 1023 mol 1] |
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Answer» We are given that the atomic mass of oxygen is 16u. In a molecule of oxygen, there are two oxygen atoms and it is denoted by O2. So, the molecular mass of O2 will be 2 x 16u = 32u. Thus, the molar mass that is the mass of 6.023 x 1023 molecules of oxygen will be 32g. So mass of 6.023 x 1023 molecules (one mole) of oxygen = 32g mass of one molecule of oxygen = [32 /(6.023 x1023) ]g = 5.313 x 10-23g Thus, the mass of one oxygen molecule will be 5.313 x 10-23g |
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