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Grade 11 · Chemistry

Grade 11 Chemistry practice

20 questions on general chemistry, analytical chemistry, organic chemistry, physical chemistry. The answer key is a separate download.

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What is on the worksheet

  1. For the abstract reaction A + 2B → C, 47 mol A and 54 mol B are available. Assume complete consumption of the limiting reactant. Find the maximum amount of C. Round to 3 decimal places if needed. Answer in mol.

  2. A sample contains 3.5 mol and has stated molar mass 83 g/mol. Find its mass. Round to 3 decimal places if needed. Answer in g.

  3. A 48 g sample is 77% desired substance by mass. Find the desired substance mass. Round to 3 decimal places if needed. Answer in g.

  4. Why is checking identical substituents necessary before assigning E/Z?

  5. A sample contains 3.7 mol and has stated molar mass 106 g/mol. Find its mass. Round to 3 decimal places if needed. Answer in g.

  6. The theoretical dry pure product mass is 155 g; the actual dry pure product mass is 7 g. Find percentage yield. Round to 3 decimal places if needed. Answer in %.

  7. Which pattern identifies a simple amide?

    1. R–CH₂–NH₂.
    2. R–CH₂–OH.
    3. R–C(=O)–NH₂.

  8. At 25 °C, use the dilute model pH + pOH = 14. A solution has pH 5. Find pOH. Round to 3 decimal places if needed.

  9. A supplied valid-range calibration is S = 6c + 0.9. The signal is 7.8. Find c in the calibration's arbitrary concentration units. Round to 3 decimal places if needed.

  10. A supplied valid-range calibration is S = 8c + 0.2. The signal is 5.5. Find c in the calibration's arbitrary concentration units. Round to 3 decimal places if needed.

  11. Ignoring end groups in a supplied model, a polymer chain has 246 repeat units, each contributing 42 g/mol to the chain molar mass. Estimate that mass. Round to 3 decimal places if needed. Answer in g/mol.

  12. A model solution contains 1.8 mol in a final volume of 0.34 L. Find its molar concentration. Round to 3 decimal places if needed. Answer in mol/L.

  13. For the abstract reaction A + 2B → C, 11 mol A and 29 mol B are available. Assume complete consumption of the limiting reactant. Find the maximum amount of C. Round to 3 decimal places if needed. Answer in mol.

  14. What does an enzyme mainly change in a catalyzed reaction?

    1. The atomic numbers.
    2. The equilibrium constant at fixed temperature.
    3. The reaction pathway and activation barrier.

  15. A 216 g sample is 48% desired substance by mass. Find the desired substance mass. Round to 3 decimal places if needed. Answer in g.

  16. Measured from the same origin, a spot travels 91 mm and the solvent front 119 mm. Find Rf. Round to 3 decimal places if needed.

  17. For one reaction as written, a bond model requires 665 kJ/mol to break bonds and releases 898 kJ/mol on forming bonds. Estimate ΔH. Round to 3 decimal places if needed. Answer in kJ/mol.

  18. A 28 mL aliquot at 0.8 mol/L is diluted to 224 mL total without reaction or loss. Find the final concentration. Round to 3 decimal places if needed. Answer in mol/L.

  19. The theoretical dry pure product mass is 33 g; the actual dry pure product mass is 7 g. Find percentage yield. Round to 3 decimal places if needed. Answer in %.

  20. A model solution contains 34 g solute and 93 g solvent. Find the solute mass percentage. Round to 3 decimal places if needed. Answer in %.

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