a.) Balance the following equation (choose the best set of coefficients): ___Magnesium (s) + ___Hydrochloric acid → ___Magnesium chloride + ___Hydrogen b.) A chemist starts with 4.5 grams of magnesium. How many moles of magnesium are present in this sample? c.) How many moles of hydrogen gas should theoretically form when all 4.5g of Magnesium react?

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A:

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A:

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A:

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A: Introduction :  We have to calculate mass of sodium chloride ,limiting reagent and excess amount .

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Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".