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**Stoichiometry The calculation of quantities using chemical reactions**

Example: If we want to make 1.5 moles of Fe2O3 using Fe + O2, how much do we need of the reactants to start?

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Mole Ratio Conversion factor derived from the coefficients of a balanced equation. It’s the BRIDGE to get across to other elements/compounds

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**N2 + 3H2 2 NH3 1 mole N2 / 3 mole H2 2 mole NH3 / 1 mole N2**

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**Mole-Mole Calculations**

Predict products (possible) Balance equation Determine mole ratios Start with what the problem gives you - ALWAYS! Use the correct mole ratio

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**Magnesium and oxygen react to form ____________.**

How many moles of the product are produced when 1.2 moles of oxygen react with excess magnesium? How many moles of magnesium reacted in the problem above?

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SCH3U 5.2 Introduction to Stoichiometry. What is Stoichiometry? Stoichiometry is the study of the quantities involved in chemical reactions. The word.

SCH3U 5.2 Introduction to Stoichiometry. What is Stoichiometry? Stoichiometry is the study of the quantities involved in chemical reactions. The word.

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