Related Questions

    1.

    Which of the following statement is correct

    A

    28 g CO contains 12 g carbon and 16 g oxygen

    B

    One mole of CO reacts completely with half mole of O2{O_2} to form CO2C{O_2}

    C

    N2{N_2} and CO have same molar mass

    D

    All of these

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    3.

    One mole of β€…β€ŠCO2\;{\rm{C}}{{\rm{O}}_2} contains:

    A

    6.02imes1023atomsβ€…β€Šofβ€…β€ŠC6.02 imes {10^{23}}{\rm{atoms}}\;{\rm{of}}\;{\rm{C}}

    B

    6.02imes1023atomsβ€…β€Šofβ€…β€ŠO6.02 imes {10^{23}}{\rm{atoms}}\;{\rm{of}}\;{\rm{O}}

    C

    3.01imes1023moleculesβ€…β€Šofβ€…β€ŠCO23.01 imes {10^{23}}molecules\;of\;C{O_2}

    D

    None of the above

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    4.

    How many molecules are present in 9 g of water?

    A

    6.022imes10236.022 imes 10^{23}

    B

    3.011imes10233.011 imes 10^{23}

    C

    1.204imes10241.204 imes 10^{24}

    D

    1.806imes10241.806 imes 10^{24}

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