Mass in a chemical reaction: using moles
Lesson 9 / 30
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I can interpret a balanced symbol equation to predict the mass of either a reactant or a product.
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In a chemical reaction, the atoms in reactants are rearranged and are the same atoms that are in the products.
Chemical equations are most correctly interpreted in terms of molar ratios (i.e. 1 mole of A reacts with 2 moles of B).
The molar ratios of the substances in a chemical reaction is known as stoichiometry, which means ‘measuring elements’.
The stoichiometry of a reaction is shown by coefficients in a balanced equation. These molar relationships don't change.
The moles of substance in a reaction can be determined using: mass(g) = Mr × moles (& the stoichiometry of reaction).
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