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Norma-Jean [14]
3 years ago
6

According to the reaction, below, how many grams of aluminum are needed to react fully with 100 grams of sulfur? 2AL + 3s - Al2S

3
Chemistry
1 answer:
mamaluj [8]3 years ago
7 0

Answer: 56.2 g of Aluminium is needed to react fully with 100 grams of sulphur.

Explanation:

To calculate the moles :

\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}    

\text{Moles of} S=\frac{100g}{32g/mol}=3.125moles

The balanced chemical equation is:

2Al+3S\rightarrow Al_2S_3  

According to stoichiometry :

3 moles of S require = 2 moles of Al

Thus 3.125 moles of S will require=\frac{2}{3}\times 3.125=2.08moles  of Al  

Mass of Al=moles\times {\text {Molar mass}}=2.08moles\times 27g/mol=56.2g

Thus 56.2 g of Aluminium is needed to react fully with 100 grams of sulphur.

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