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M(Al2S3)=2×27+3×32=54+96=150 g/mol
150 g Al2S3...2×27 g Al
100...x​


Răspuns :

Răspuns:

M(Al2S3)=2×27+3×32=54+96=150 g/mol

150 g Al2S3.............2×27 g Al

100g Al2S3......................x% Al

x=100×2×27/150=calculează