дано
m(Na) = 46 g
V(H2)-?
2Na+H2O-->2NaOH+H2
M(Na) = 23 g/mol
n(Na) = m/M = 46 / 23 = 2 mol
2n(Na) = n(H2)
n(H2) = 2/2 = 1 mol
V(H2) = n*Vm = 1*22.4 = 22.4 L
ответ 22.4л
дано
m(Na) = 46 g
V(H2)-?
2Na+H2O-->2NaOH+H2
M(Na) = 23 g/mol
n(Na) = m/M = 46 / 23 = 2 mol
2n(Na) = n(H2)
n(H2) = 2/2 = 1 mol
V(H2) = n*Vm = 1*22.4 = 22.4 L
ответ 22.4л