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`You have to be careful about pouring drano down your pipes since it is mainly hydrochloric acid--you can't do it if they are made of aluminum because it will dissolve them! You can't acid clean your aluminum auto parts for the same reasons: 2 Al + 6 HCl → 2 AlCl3 + 3H2. If you wanted to make 10.0 moles of hydrogen gas, how many many moles of Al would you need? NOTE: All numbers located immediately after elemental symbols should be considered subscripts.

Respuesta :

Answer:

6.67 moles

Explanation:

Given that:-

Moles of hydrogen gas produced = 10.0 moles

According the reaction shown below:-

[tex]2Al + 6HCl\rightarrow 2AlCl_3 +3H_2[/tex]

3 moles of hydrogen gas are produced when 2 moles of aluminium undergoes reaction.

Also,

1 mole of hydrogen gas are produced when [tex]\frac{2}{3}[/tex] moles of aluminium undergoes reaction.

So,

10.0 moles of hydrogen gas are produced when [tex]\frac{2}{3}\times 10.0[/tex] moles of aluminium undergoes reaction.

Moles of Al needed  = [tex]\frac{2}{3}\times 10.0[/tex] moles = 6.67 moles

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