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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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Answer:

Percent composition tells you which types of atoms (elements) are present in a molecule and their levels. Percent composition can also tell you about the different elements present in an ionic compound as well.

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3 years ago
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A student weighed an empty graduated cylinder. It weighed 35.86 g. She then carefully added water to the graduated cylinder unti
Firdavs [7]

Question:

A student weighed an empty graduated cylinder. It weighed 35.86 g. She then carefully added water to the graduated cylinder until it reached the 7.5 mL mark. When she weighed the graduated cylinder again, this time with the 7.5 mL of water in it, it weighed 43.18 g. What was this student's experimental density of water?

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0.976 g/mL

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3 years ago
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3 0
3 years ago
How many moles are there in 2.75L of a 2.0M solution
gtnhenbr [62]
5.5 moles
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