1)
дано
m(CuSO4) = 9 g
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n(CuSO4)-?
M(CuSO4) = 160 g/mol
n(CuSO4) = m/M = 9 / 160 = 0.05625 mol
ответ : 0.05625 mol
2)
дано
n(Al(OH)3) = 1.3 mol
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m(Al(OH)3)-?
M(Al(OH)3) = 78 g/mol
m(Al(OH)3) = n*M = 1.3 * 78 = 101.4 g
ответ: 101.4 g
3)
дано
m(FeO) = 23 g
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n(FeO)-?
M(FeO) = 72 g/mol
n(FeO) = m/M = 23 / 72 = 0.314 mol
ответ: 0.314 mol
4)
дано
n(C) = 1.1 mol
----------------------------
m(C)-?
M(C) = 12 g/mol
m(C) = n*M = 1.1 * 12 = 13,2 g
ответ 13.2 g