дано
m(Fe) = 1.12 g
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n(Fe)-?
M(Fe) = 56 g/mol
n(Fe) = m/M = 1.12 / 56 = 0.02 mol
ответ 0.02 моль
дано
V(N2) = 33.6 L
Vm = 22.4 L / mol
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n(N2)-?
m(N2)-?
n(N2) = V(N2) / Vm = 33.6 / 22.4 = 1.5 mol
M(N2) = 28 g/mol
m(N2) = n*M = 1.5 * 28 = 42 g
ответ 42 г , 1.5 моль
дано
n(H2S) = 2 mol
Vm = 22.4 l/mol
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m(H2S)-?
V(H2S)-?
V(H2S) = n*Vm = 2*22.4 = 44.8 L
M(H2S) = 34 g/mol
m(H2S) = n*M = 2*34 = 68 g
ответ 68 г, 44.8 л