дано
n(CL2) = 2 mol
----------------------
V(HCL)-?
H2+CL2-->2HCL
n(CL2) = 2n(HCL)
n(HCL)= 2*2 = 4 mol
V(HCL) = Vm*n = 22.4 * 4 = 89.6 L
ответ 89.6 л
4)
m(CaO) = 56 g
--------------------
m(Ca)-?
V(O2)-?
2Ca+O2-->2CaO
M(CaO) = 56 g/mol
n(CaO) = m/M= 56 / 56 = 1 mol
2n(Ca) = 2n(CaO) = 1 mol
n(Ca) = 1 moL
M(Ca) = 40 g/mol
m(Ca) = n*M = 1*40 = 40 g
n(O2) = 2n(CaO)
n(O2) = 1/2 = 0.5 mol
V(O2) = Vm*n = 22.4 * 0.5 = 11.2 L
ответ 40 г., 11.2 л
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Answers & Comments
дано
n(CL2) = 2 mol
----------------------
V(HCL)-?
H2+CL2-->2HCL
n(CL2) = 2n(HCL)
n(HCL)= 2*2 = 4 mol
V(HCL) = Vm*n = 22.4 * 4 = 89.6 L
ответ 89.6 л
4)
дано
m(CaO) = 56 g
--------------------
m(Ca)-?
V(O2)-?
2Ca+O2-->2CaO
M(CaO) = 56 g/mol
n(CaO) = m/M= 56 / 56 = 1 mol
2n(Ca) = 2n(CaO) = 1 mol
n(Ca) = 1 moL
M(Ca) = 40 g/mol
m(Ca) = n*M = 1*40 = 40 g
n(O2) = 2n(CaO)
n(O2) = 1/2 = 0.5 mol
V(O2) = Vm*n = 22.4 * 0.5 = 11.2 L
ответ 40 г., 11.2 л