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Grade 11 · Science

Grade 11 Chemistry worksheet

20 questions on chemistry. The answer key is a separate download.

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What is on the worksheet

  1. An ideal decay model starts with 320 mg. What expected mass remains after 6 half-lives, in mg?

  2. A sample has mass 1040 g and molar mass 80 g/mol. Find its amount in mol.

  3. In a simplified isotope exercise, atomic number Z = 7 and mass number A = 26. How many neutrons?

  4. A solution contains 40 mol of solute in a final solution volume of 10 L. Find concentration in mol/L as a fraction or decimal.

  5. An ideal decay model starts with 116 mg. What expected mass remains after 2 half-lives, in mg?

  6. A hypothetical element has isotopes of mass 33 u (65%) and 37 u (35%). Calculate its mean atomic mass in u.

  7. Dilute 220 mL of a 3.6 mol/L solution to 0.9 mol/L without losing solute. Find the final volume in mL.

  8. An ideal gas occupies 25 L at 330 K. With pressure and amount fixed, find its volume at 660 K in L.

  9. Atomic structure and chemical language: which term fits this description? A reaction that releases heat to the surroundings under the specified conditions.

    1. Exothermic reaction
    2. Reactant
    3. Product
    4. Catalyst

  10. A solution contains 18 mol of solute in a final solution volume of 10 L. Find concentration in mol/L as a fraction or decimal.

  11. An ideal decay model starts with 120 mg. What expected mass remains after 1 half-lives, in mg?

  12. In a simplified isotope exercise, atomic number Z = 17 and mass number A = 46. How many neutrons?

  13. A sample has mass 816 g and molar mass 48 g/mol. Find its amount in mol.

  14. Dilute 20 mL of a 3 mol/L solution to 0.5 mol/L without losing solute. Find the final volume in mL.

  15. Dilute 90 mL of a 4.9 mol/L solution to 0.7 mol/L without losing solute. Find the final volume in mL.

  16. Atomic structure and chemical language: which term fits this description? A reaction that absorbs heat from the surroundings under the specified conditions.

    1. Mole
    2. Anion
    3. Product
    4. Endothermic reaction

  17. Dilute 240 mL of a 0.8 mol/L solution to 0.2 mol/L without losing solute. Find the final volume in mL.

  18. Dilute 190 mL of a 5.4 mol/L solution to 0.9 mol/L without losing solute. Find the final volume in mL.

  19. An ideal gas occupies 18 L at 380 K. With pressure and amount fixed, find its volume at 760 K in L.

  20. A solution contains 24 mol of solute in a final solution volume of 15 L. Find concentration in mol/L as a fraction or decimal.

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