Mole Ratios in Chemical Reactions
This worksheet focuses on understanding and applying mole ratios in balanced chemical equations for Grade 9 Science students.
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Mole Ratios in Chemical Reactions
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Read each question carefully and answer to the best of your ability. Show all work for calculations.
1. What does a mole ratio represent in a balanced chemical equation?
The ratio of masses of reactants and products.
The ratio of volumes of gases in a reaction.
The ratio of moles of any two substances in the reaction.
The ratio of atoms in a molecule.
2. For the reaction 2H₂ + O₂ → 2H₂O, what is the mole ratio of H₂ to H₂O?
1:1
2:1
1:2
2:2
3. In a balanced chemical equation, the coefficients represent the number of of each reactant and product.
4. Mole ratios are derived from the of a chemical reaction.
5. Consider the balanced chemical equation: N₂ + 3H₂ → 2NH₃. Write all possible mole ratios for this reaction.
6. Using the reaction 2CO + O₂ → 2CO₂, if you have 4 moles of CO, how many moles of O₂ are required for a complete reaction?
7. Mole ratios can only be used to compare reactants with other reactants.
True
False
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