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280 grame zinc de puritate 82%reactioneaza cu acidul clorhidric ce masa de clorura zinc se formeaza si cati moli se degaja?
plz HELP


Răspuns :

p=mp/mimp*100=>mp=82*280/100=229,6g Zn

Zn + 2HCl => ZnCl2 + H2

65g Zn......................136g ZnCl2
229,6g Zn....................xg ZnCl2

x=136*229,6/65 = 

65g Zn.............................1 mol H2
229,6g Zn.......................x moli H2

x=1*229,6/65 =