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lesya [120]
2 years ago
14

What mass of H2 gas (in g. would be produced by the complete reaction of the aluminum block?

Chemistry
1 answer:
loris [4]2 years ago
3 0

First lets calculate the moles of aluminum (molar mass is 27 gram/mol):

n = m/M = 14.9 / 27 = 0.551 mole of Al


According to the reaction between sulfuric acid and aluminum:

From 2 moles of aluminum ==> we get 3 moles of Hydrogen gas

so, let's do cross multiplication

0.551 ==> 0.551 * 3/2 = 0.83 mole of H2


So, from this reaction we got 0.83 mole of H2 gas

knowing that the molar mass of H2 is 2 gram/mol, the mass of the gas is.

m = n * M = 0.83 * 2 = 1.66 gram of H2


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