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Molecular Speeds - Vrms, Vavg, Vmps

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Question

you are supplied with a gas containing 0.32g of oxygen. calculate the number of moles and number of molecules present in it

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Solution

1 mole of oxygen gas will weigh 32 g and will have 6.023 * 10^23 molecules.
Therefore, 0.32 g of gas will have 0.01 moles of oxygen.
0.32 g of gas will have 6.023 * 10^21 molecules of oxygen.

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