Question

X g Zn reactioneaza cu 100 g HCl. Ce substante se formeaza si in ce cantitati?

Answer 1

Zn + 2HCl => ZnCl2 + H2

65g Zn...............2*36,5g HCl..............136g ZnCl2............2g H2
xg.........................100g..........................y..............................z

x=65*100/73=Calculeaza !!

y=136*100/73=186,3g ZnCl2

z=2*100/73=2,739g H2

n=m/M=186,3/136=Calculeaza ! (moli)

n=m/M=2,739/2= Calculeaza ! (moli)