1 )
ДАНО
m(Fe) = 2.8 g
n(Fe) -?
M(Fe) = 56 g/mol
n(Fe) = m/M =2.8 / 56 = 0.2 mol
ответ 0.2 моль
2)
А)
n(O2) = 5 mol
N(O2)-?
N(O2) = n(O2) * N(A) = 5*6.02*10^23 = 30.1*10^23 молекул
б)
m(SO3) = 128 g
N(SO3)-?
M(SO3) = 80 g/mol
N(SO3) = m/M * N(A) = 128 / 80 * 6.02*10^23 = 9.632 * 10^23 молекул
в)
V(H2O) = 112 L
N(H2O) -?
N(H2O) = V(H2O) / Vm*N(A) = 112 / 22.4* 6.02*10^23=30.1*10^23 молекул
г)
V(H2) = 44.8 L
N(H2) = ?
N(H2) = V(H2)/Vm*N(A) = 44.8/22.4*6.02*10^23=12.04*10^23 молекул
д)
m(CL2) = 7.1 g
N(CL2)-?
M(CL2) = 71 g/mol
N(CL2) = m/M*N(A) = 7.1 / 71*6.02*10^23 = 0.602*10^23 молекул
ответ 1) а,в
