m = 1280g Cu
CuO + H₂ ⇒ Cu + H₂O
a) m CuO = ?
p=80%
MCuO=ACu+AO=64+16=80g/mol
MCu=64g/mol
n=m/M=1280/64=20 moli Cu
80g CuO...................1 mol Cu
xg...............................20 moli
x=80*20=1600g CuO
p=mp/mimp*100 ⇒mimp=mp*100/p=1600*100/80=Calculeaza !!!
b) 1 mol H₂................1 mol Cu
20 moli H₂.................20 moli Cu
c) Zn + 2HCl ⇒ ZnCl₂ + H₂↑
2*36,5g HCl.......................1 mol H₂
xg HCl.................................20 moli H₂
x=73*20=1460g HCl (md)
C=md/ms*100=>ms=md*100/C=1460*100/10= Calculeaza !!!
MHCl=AH+ACl=1+35,5=36,5g/mol
