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How many equivalents of Mg would have to...

How many equivalents of Mg would have to react in order to liberate `4 N_(A)` electrons ? `(Mg-2e^(-)rarrMg^(2+))`

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4
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Knowledge Check

  • The energy equivalent of 2.0 mg mass defect is

    A
    `1.8 xx 10^4` erg
    B
    `9xx 10^(-19)` erg
    C
    `1.5 xx 10^20` erg
    D
    `1.8 xx 10^18` erg

  • In the reaction 3 Mg+N_(2) rarr Mg_(3)N_(2)

    A
    Magnesium is reduced
    B
    Magnesium is oxidized
    C
    Nitrogen is oxidized
    D
    None of these

  • How many kg are there in 5.2 mg?

    A
    `5.2xx10^(-3)kg`
    B
    `5.2xx10^(-6)kg`
    C
    `5.2xx10^(-5)kg`
    D
    `5.2xx10^(-9)kg`