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    Stoichiometry practice questions

    Does anyone know any sites with stoichiometry. I need to practice some questions.Site with practice problems and example that are easy to follow?
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    Helppppp Stoichiometry (sp?)

    1. Aluminum chloride (15.0g) + sodium hydroxide (15g) = double displacement reaction.Predict mass of aluminum hydroxide produced. What mass of the excess reagent remains unreacted? 2. What mass of copper(II) sulfate pentahydrate is needed to prepare 150.0 mL of a 0.125mol/L solution...