дано
m(P2O5) = 7.1 g
n(P)-?
V(O2)-?
4P+5O2-->2P2O5
M(P2O5) = 142 g/mol
n(P2O5) = m/M = 7.1 / 142 = 0.05 mol
4n(P) = 2n(P2O5)
n(P) = 4* 0.05 / 2 = 0.1 mol
5n(O2) = 2n(P2O5)
n(O2) = 5* 0.05 / 2 = 0.125 mol
V(O2) = n(O2) * Vm = 0.125 * 22.4 = 2.8 L
ответ 0.1 моль, 2.8 л
Объяснение:
дано
m(P2O5) = 7.1 g
n(P)-?
V(O2)-?
4P+5O2-->2P2O5
M(P2O5) = 142 g/mol
n(P2O5) = m/M = 7.1 / 142 = 0.05 mol
4n(P) = 2n(P2O5)
n(P) = 4* 0.05 / 2 = 0.1 mol
5n(O2) = 2n(P2O5)
n(O2) = 5* 0.05 / 2 = 0.125 mol
V(O2) = n(O2) * Vm = 0.125 * 22.4 = 2.8 L
ответ 0.1 моль, 2.8 л
Объяснение: