Дано
m(Pb) = 41.4 g
----------------------------
n(O2)-?
m(O2)-?
V(O2)-?
41.4 Xg
2Pb + O2-->2PbO M(Pb)= 207 g/mol M(O2) = 32 g/mol
2*207 32
X = 41.4*32 / 414 = 3.2 g
n(O2) = m(O2) / M(O2) = 3.2/32 = 0.1 mol
V(O2)= n(O2)*Vm = 0.1*22.4 = 2.24 L
ответ 3.2 г, 0.1 моль, 2.22 л