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How many formula units of aluminum are required to produce 9.9 grams of hydrogen in #2Al + 3H_2SO_4 -> Al_2(SO_4)_3 + 3H_2#?

1 Answer

May 16, 2016

You have the balanced chemical equation. #"Moles of dihydrogen = "3/2xx"moles of aluminum"#

Explanation:

Given the stoichiometric equation, you have established the stoichiometry.

#"Moles of dihydrogen"# #=# #(9.9*g)/(2.0*g*mol^-1)# #=# #??*mol#.

The moles of aluminum metal is #2/3# this quantity.

And of course #"1 mole"# #=# #6.022xx10^23" formula units"#.

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