дано
m(HNO3) = 252 g
m(H2O) - ?
V(O2) - ?
4HNO3 -> 4NO2 + 2H2O + O2
M(HNO3) = 63 g/mol
n(HNO3) = m/M = 252 / 63 = 4 mol
4n(HNO3) = 2 n(H2O)
n(H2O) = 4*2/4 = 2 mol
M(H2O) = 18 g/mol
m(H2O) = n*M = 2*18 = 36 g
4n(HNO3) = n(O2)
n(O2) = 4*1/4 = 1 mol
V(O2) = n*Vm = 1*22.4 =22.4 L
ответ 36 гр, 22.4 л
Объяснение:
дано
m(HNO3) = 252 g
m(H2O) - ?
V(O2) - ?
4HNO3 -> 4NO2 + 2H2O + O2
M(HNO3) = 63 g/mol
n(HNO3) = m/M = 252 / 63 = 4 mol
4n(HNO3) = 2 n(H2O)
n(H2O) = 4*2/4 = 2 mol
M(H2O) = 18 g/mol
m(H2O) = n*M = 2*18 = 36 g
4n(HNO3) = n(O2)
n(O2) = 4*1/4 = 1 mol
V(O2) = n*Vm = 1*22.4 =22.4 L
ответ 36 гр, 22.4 л
Объяснение: