Form 7: Mass Conservation Calculations Exercise

Form 7: Mass Conservation Calculations

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Form 7: Mass Conservation Calculations

In this engaging exercise, students in Form 7 will dive into the principle of mass conservation by solving real-world problems, calculating the mass of substances before and after chemical reactions, and exploring how mass is neither created nor destroyed. By applying their knowledge of stoichiometry, learners will develop critical thinking skills and a deeper understanding of chemical processes.

Questions

  1. MultiChoice

    56 g of iron reacts completely with 44 g of sulfur. What is the mass of iron sulfide formed?

  2. MultiChoice

    If 36 g of water decomposes into 32 g of oxygen gas and hydrogen gas, what is the mass of hydrogen gas?

  3. MultiChoice

    100 g of calcium carbonate decomposes into 56 g of calcium oxide and carbon dioxide gas. What mass of CO2 is released?

  4. MultiChoice

    48 g of magnesium reacts with 32 g of oxygen gas. What mass of magnesium oxide is formed?

  5. MultiChoice

    3 g of hydrogen reacts with 8 g of oxygen to form water. What mass of water is produced?

  6. MultiChoice

    If 46 g of sodium reacts with 71 g of chlorine, producing 117 g of NaCl, what is the combined reactant mass?

  7. MultiChoice

    Methane (16 g) reacts with oxygen (64 g) to produce carbon dioxide (44 g) and water. What mass of water is formed?

  8. MultiChoice

    In the reaction CH4 (16 g) + 2 O2 (64 g) -> CO2 (44 g) + 2 H2O (X g), find X.

  9. MultiChoice

    If 20 g of A reacts with 10 g of B to form 15 g of C and some D, what is the mass of D?

  10. MultiChoice

    34 g of ammonia decomposes into 6 g of hydrogen gas and nitrogen gas. What mass of nitrogen gas is produced?

  11. MultiChoice

    2 moles of H2O2 (68 g) produce 36 g of water and oxygen gas. What mass of oxygen gas is produced?

  12. MultiChoice

    If 68 g of hydrogen peroxide decomposes into 36 g of water and X g of oxygen gas, solve for X.