MgO + 2HNO₃ = Mg(NO₃)₂ + H₂O
M(Mg(NO₃)₂) = 24 + 2(14 +48) = 148(г/моль)
n(Mg(NO₃)₂) = 80/148 = 0,54(моль)
n(MgO)= n(Mg(NO₃)₂) = 0,54(моль)
m(MgO) = n(MgO)·M(MgO) =0,54·40 = 21,6 (г)
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MgO + 2HNO₃ = Mg(NO₃)₂ + H₂O
M(Mg(NO₃)₂) = 24 + 2(14 +48) = 148(г/моль)
n(Mg(NO₃)₂) = 80/148 = 0,54(моль)
n(MgO)= n(Mg(NO₃)₂) = 0,54(моль)
m(MgO) = n(MgO)·M(MgO) =0,54·40 = 21,6 (г)