Stoichiometric Calculations Worksheet
Grade 9 Chemistry worksheet focusing on stoichiometric calculations, including mole-to-mass conversions, limiting reactants, and percentage yield.
Includes
Standards
Topics
Stoichiometric Calculations
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Read each question carefully and show all your work. Use the periodic table to find atomic masses when needed.
1. Calculate the mass in grams of 2.5 moles of sodium chloride (NaCl).
2. How many moles are present in 100 grams of calcium carbonate (CaCO₃)?
3. Balance the following chemical equation and then state the mole ratio of H₂ to H₂O: H₂ + O₂ → H₂O Balanced Equation: Mole Ratio of H₂ to H₂O:
4. If 5 moles of H₂ react with 2 moles of O₂ to produce H₂O, which reactant is the limiting reactant?
5. A reaction has a theoretical yield of 50 grams. If the actual yield is 40 grams, what is the percentage yield?
20%
80%
125%
50%
6. The law of conservation of mass states that mass cannot be created or destroyed in a chemical reaction.
True
False