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    4 simple chemistry questions relating avogadro number and ph

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    i) What is the mass of 1.00 mol of CH2Cl2?

    ii) How many atoms of sodium are there in 1.00 mol of sodium?

    iii) How many hydrogen atoms are there in 3.75 mol methane (CH4)?

    iv) Give an example of a physical change involving colors.

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    Solution Preview

    i. Molecular weight of CH2Cl2 = 12+2+71=85(g/mol)
    So 1 mol of CH2Cl2 will have the weight of 85g.

    ii. 1 mol of a substance will have 6.022x 10^23 atoms. ...

    Solution Summary

    The solution provides detailed explanations and answer for the problem regarding simple chemistry questions.