n(H2) = 6.72 / 22.4 = 0.3 моль
n(Mg)=n(H2) = 0.3
Ar(Mg) = 24
m(Mg) = 24 * 0.3 = 7.2 Г
m(MgO) = 11/2 - 7/2 = 3 г
w%(Mg) = 7.2 / 11.2 * 100 = 64.285%
w%(MgO) = 100 - 64.285 = 35.715%
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Answers & Comments
n(H2) = 6.72 / 22.4 = 0.3 моль
n(Mg)=n(H2) = 0.3
Ar(Mg) = 24
m(Mg) = 24 * 0.3 = 7.2 Г
m(MgO) = 11/2 - 7/2 = 3 г
w%(Mg) = 7.2 / 11.2 * 100 = 64.285%
w%(MgO) = 100 - 64.285 = 35.715%