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piszemy reakcje:
54g 96g 150g
2Al + 3S -> Al2S3
2.5g 4g
1 molS - 32g
0.125mola -x
x=0.125molax32g/1mol=4g
I
54 g - 150g
2.5g - x
x=2.5gx150g/54g=6.94g
II
96g - 150g
4g - x
x=4gx150g/96g=6.25g
Opd. Otrzymamy 6.26g siarczku glinu