Homework Help: Chemistry

Posted by Liz on Tuesday, October 6, 2009 at 11:08pm.

Suppose you wanted to dissolve an aluminum block with a mass of 15.4 g
What mass of H2 gas (in g) would be produced by the complete reaction of the aluminum block?.

Chemistry - DrBob222, Tuesday, October 6, 2009 at 11:29pm
2Al + 6HCl ==> 2AlCl3 + 3H2

Convert 15.4 g Al to moles. moles = grams/molar mass
Convert moles Al to moles H2 using the coefficients in the balanced equation.
Convert moles H2 gas to grams. grams = moles x molar mass.

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