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mHCl=1u+35,5u=36,5u
mAlCl3=27u+3*35,5u=133,5u
2Al + 6HCl----->2AlCl3 + 3H2
2*27g Al--------6*36,5g HCl
3g Al------------xg HCl
x=3*219/54
x=12,17g HCl
W nadmiarze użyto HCl, więc dalsze obliczenia wykonuję dla Al
2*27g Al--------2*133,5g AlCl3
3g Al------------xg AlCl3
x=3*267/54
x=14,83g AlCl3
AlCl3 + 3NH3 + 3H2O----->Al(OH)3 + 3NH4Cl
133,5g AlCl3------3*22,4dm3 NH3
14,83g AlCl3--------xdm3 NH3
x=7,46dm3 amoniaku
1dm3=1 litr
x=7,46 litra amoniaku