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April 19, 2014

Homework Help: Chemistry

Posted by SIMON on Friday, February 20, 2009 at 10:52pm.

Based on the balanced equation

Al2S3 + 6H2O → 2Al(OH)3 + 3H2S
calculate the number of excess reagent units remaining when 4 Al2S3 formula units and 30 H2O molecules react?

Molar Mass (g/mol)
Al2S3 150.16
H2O 18.015
Al(OH)3 75.361
H2S 34.082
Avogadro's No.
6.0221023 mol-1

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