Worksheet

Stoichiometry: from grams of one substance to grams of another

Grade 10 Science Worksheet - Challenge Me

NameDate

Circle the best answer, or write your answer on the line.

  1. Respiration gives 6 mol of CO₂ for each mole of glucose. Glucose is 180.18 g/mol and CO₂ 44.01 g/mol. How many grams of CO₂ come from 36.036 g of glucose, to 0.01 g, Esme?

  2. Respiration gives 6 mol of water for each mole of glucose. Glucose is 180.18 g/mol and water 18.02 g/mol. How many grams of water come from 54.054 g of glucose, to 0.01 g, Jun?

  3. In 2H₂ + O₂ → 2H₂O (equation only), 2 mol of water form per mole of O₂ (32 g/mol); water is 18.02 g/mol. How many grams of water come from 48 g of O₂, Kira?

  4. Milo says a 1 : 1 equation means equal grams of each substance. Which reply fits, Milo?

    • Disagree: equal moles, but the molar masses differ
    • Agree, if the substances are solids
    • Agree: 1 : 1 means 1 g to 1 g

  5. Noah says respiration destroys some of the glucose's mass. Which reply fits, Noah?

    • Agree: the products weigh less than the reactants
    • Disagree: its atoms end up in the CO₂ and water
    • Agree: the mass is used up as energy

  6. Baking soda (84.01 g/mol) gives CO₂ (44.01 g/mol) 1 : 1 with vinegar. How much CO₂ comes from 21.00 g of baking soda, Pia?

    • 21.00 g, the same mass
    • About 11.00 g
    • About 40.09 g, using the molar masses the wrong way round

  7. How much baking soda (84.01 g/mol) makes 4.40 g of CO₂ (44.01 g/mol) with vinegar, 1 : 1, Ren?

    • About 2.31 g, using the molar masses the wrong way round
    • 4.40 g, the same mass
    • About 8.40 g

  8. How much vinegar acid (CH₃COOH, 60.06 g/mol) reacts with 8.401 g of baking soda (84.01 g/mol), 1 : 1, Tala?

    • About 6.01 g
    • About 11.75 g, using the molar masses the wrong way round
    • 8.40 g, the same mass

  9. In 2H₂ + O₂ → 2H₂O (an equation only), how many grams of H₂ and of O₂ make 36.04 g of water, Ari?

    • 2.02 g of H₂ and 16.00 g of O₂
    • 4.04 g of H₂ and 32.00 g of O₂
    • 36.04 g of each reactant

  10. Photosynthesis makes 90.09 g of glucose. How many grams of O₂ are released, Bo?

    • 90.09 g, the same mass as the glucose
    • 16.00 g, from 0.5 mol of O₂
    • 96.00 g, from 3 mol of O₂
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Stoichiometry: from grams of one substance to grams of another

Answer Key - Grade 10 Science Worksheet - Challenge Me

Circle the best answer, or write your answer on the line.

  1. Respiration gives 6 mol of CO₂ for each mole of glucose. Glucose is 180.18 g/mol and CO₂ 44.01 g/mol. How many grams of CO₂ come from 36.036 g of glucose, to 0.01 g, Esme?

    52.81 g

  2. Respiration gives 6 mol of water for each mole of glucose. Glucose is 180.18 g/mol and water 18.02 g/mol. How many grams of water come from 54.054 g of glucose, to 0.01 g, Jun?

    32.44 g

  3. In 2H₂ + O₂ → 2H₂O (equation only), 2 mol of water form per mole of O₂ (32 g/mol); water is 18.02 g/mol. How many grams of water come from 48 g of O₂, Kira?

    54.06 g

  4. Milo says a 1 : 1 equation means equal grams of each substance. Which reply fits, Milo?

    • Disagree: equal moles, but the molar masses differ
    • Agree, if the substances are solids
    • Agree: 1 : 1 means 1 g to 1 g

  5. Noah says respiration destroys some of the glucose's mass. Which reply fits, Noah?

    • Agree: the products weigh less than the reactants
    • Disagree: its atoms end up in the CO₂ and water
    • Agree: the mass is used up as energy

  6. Baking soda (84.01 g/mol) gives CO₂ (44.01 g/mol) 1 : 1 with vinegar. How much CO₂ comes from 21.00 g of baking soda, Pia?

    • 21.00 g, the same mass
    • About 11.00 g
    • About 40.09 g, using the molar masses the wrong way round

  7. How much baking soda (84.01 g/mol) makes 4.40 g of CO₂ (44.01 g/mol) with vinegar, 1 : 1, Ren?

    • About 2.31 g, using the molar masses the wrong way round
    • 4.40 g, the same mass
    • About 8.40 g

  8. How much vinegar acid (CH₃COOH, 60.06 g/mol) reacts with 8.401 g of baking soda (84.01 g/mol), 1 : 1, Tala?

    • About 6.01 g
    • About 11.75 g, using the molar masses the wrong way round
    • 8.40 g, the same mass

  9. In 2H₂ + O₂ → 2H₂O (an equation only), how many grams of H₂ and of O₂ make 36.04 g of water, Ari?

    • 2.02 g of H₂ and 16.00 g of O₂
    • 4.04 g of H₂ and 32.00 g of O₂
    • 36.04 g of each reactant

  10. Photosynthesis makes 90.09 g of glucose. How many grams of O₂ are released, Bo?

    • 90.09 g, the same mass as the glucose
    • 16.00 g, from 0.5 mol of O₂
    • 96.00 g, from 3 mol of O₂