Дано
V(H2) = 1 L
----------------------------
m(Zn) -?
m(HCL)-?
Zn+2HCL-->ZnCL2+H2
n(H2) = V(H2) / Vm = 1 / 22.4 = 0.045 mol
M(Zn)= 65 g/mol
m(Zn) = n*M = 0.045*65 = 2.925 g
n(H2) = 2n(HCL)
n(HCL) = 2*0.045=0.09 mol
M(HCL) = 36.5 g/mol
m(HCL) = M*n = 36,5*0.09 = 3.285
ответ 2.925 г, 3.285 г