How many hydrogen atoms are in 7.20 mol of aluminum sulfide?

Answer 1

Stoichiometrically:

2 Al :=: 3 H2SO4 :=: 1 Al2(SO4)3

Molarity: 2:3:1

15 Al :=: 22.5 mole H2SO4 :=: 7.5 moles Al-sulfate

Answer 2

It's a long time since I did chemistry, but I'd like a shot at this one. The reaction would be something like: 2(Al) + 3(H2SO4) = Al(2)(SO4)3 + 3(H2).

Aluminium has a valency of 3 (I seem to remember) and the sulphate ion has a valency 2. Therefore two Als and three SO4s make a molecule with six covalent bonds -- Aluminium Sulphate.

Hydrogen gas is a cloud of H2 molecules so we have two moles of Aluminium making three moles of hydrogen gas. 3 moles of aluminium therefore make 3x3/2 = 4.5 moles of hydrogen gas. Now, a mole of gas at STP has a volume of 22.4 litres. So the answer is 4.5 x 22.4 litres by volume. That is 100.8 litres.

Answer 3

27 moles or 54 g of Hydrogen gas will produce.

2Al + 3H2SO4 ------> Al2(SO4)3 + 3H2 ,

2 moles of Al produce 3 moles of H2

1 mole --------------------3/2 moles

18 moles------------------3/2 x 18 = 27 moles

Answer 4

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Answer 5

Aluminium sulfide is Al2S3 and there is no hydrogen in it.

Answer 6

8,0 moles of aluminum sulfate contain 23,955 moles sulfur.

Answer 7

There are 1 mole of aluminum sulfide for every 6 moles of hydrogen atoms. So, in 7.20 moles of aluminum sulfide, there would be 7.20 x 6 = 43.2 moles of hydrogen atoms.

Answer 8

The volume is 22,98 L.

Answer 9

0.1693 mol