дано
n(FeS2) = 0.25 mol
----------------------
m(FeS2)-?
M(FeS2) = 56+32*2 = 120 g/mol
m(FeS2) = n(FeS2) * M(FeS2) = 0.25 * 120 = 30 g
ответ 30 г
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дано
n(FeS2) = 0.25 mol
----------------------
m(FeS2)-?
M(FeS2) = 56+32*2 = 120 g/mol
m(FeS2) = n(FeS2) * M(FeS2) = 0.25 * 120 = 30 g
ответ 30 г