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21 July, 13:50

Which equation is not balanced?

A 2Mg (s) + O2 (g) → 2MgO (s)

B 2Mg (NO3) 2 (s) → 2MgO (s) + 4NO2 (g) + O2 (g)

C MgO (s) + HCl (aq) → MgCl2 (aq) + H2O (1)

D Mg (s) + CuSO4 (aq) → MgSO4 (aq) + Cu (s)

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  1. 21 July, 14:45
    0
    c is not balanced

    Explanation:

    in order to be balance it would need a 2 in front of HCl because there is only one H and Cl on left
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