Ответ:
дано
m(Fe+Cu) = 8 g
V(H2) = 2.56 L
---------------------
W(Fe)-?
W(Cu)-?
Cu+HCL≠
Fe+2HCL-->FeCL2+H2
n(H2) = V(H2) / Vm = 2.56 / 22.4 = 0.11 mol
n(H2) = n(Fe) = 0.11 mol
M(Fe) = 56 g/mol
m(Fe) = n*M = 0.11*56 = 6.16 g
m(Cu) = m(Fe+Cu) - m(Fe) = 8 - 6.16 = 1.84 g
W(Fe) = m(Fe) / m(Fe+Cu) *100% = 6.16 / 8 * 100% = 77 %
W(Cu) = 100% - W(Fe) = 100 - 77 = 23 %
ответ 77% железа , 23% меди
Объяснение:
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Answers & Comments
Ответ:
дано
m(Fe+Cu) = 8 g
V(H2) = 2.56 L
---------------------
W(Fe)-?
W(Cu)-?
Cu+HCL≠
Fe+2HCL-->FeCL2+H2
n(H2) = V(H2) / Vm = 2.56 / 22.4 = 0.11 mol
n(H2) = n(Fe) = 0.11 mol
M(Fe) = 56 g/mol
m(Fe) = n*M = 0.11*56 = 6.16 g
m(Cu) = m(Fe+Cu) - m(Fe) = 8 - 6.16 = 1.84 g
W(Fe) = m(Fe) / m(Fe+Cu) *100% = 6.16 / 8 * 100% = 77 %
W(Cu) = 100% - W(Fe) = 100 - 77 = 23 %
ответ 77% железа , 23% меди
Объяснение: