Stoichiometry: from grams of one substance to grams of another
Grade 10 Science Worksheet
Circle the best answer, or write your answer on the line.
Baking soda and vinegar give CO₂ 1 : 1. How many grams of CO₂ (44.01 g/mol) come from 16.8 g of baking soda (84.01 g/mol), to 0.01 g, Bo?
Baking soda and vinegar give CO₂ 1 : 1. How many grams of CO₂ (44.01 g/mol) come from 42 g of baking soda (84.01 g/mol), to 0.01 g, Esme?
Baking soda and vinegar give CO₂ 1 : 1. How many grams of CO₂ (44.01 g/mol) come from 8.4 g of baking soda (84.01 g/mol), to 0.01 g, Jun?
In respiration, how many grams of CO₂ come from 180.18 g of glucose, Kira?
- 264.06 g, from 6 mol × 44.01 g/mol
- 44.01 g, from 1 mol of CO₂
- 180.18 g, the same mass as the glucose
In respiration, how many grams of O₂ react with 90.09 g of glucose, Luz?
- 16.00 g, from 0.5 mol of O₂ with no ratio
- 96.00 g, from 3 mol × 32.00 g/mol
- 540.54 g, from 90.09 × 6
In photosynthesis, how many grams of O₂ are released when 88.02 g of CO₂ is used, Pia?
- 88.02 g, the same mass as the CO₂
- 10.67 g, from 2 ÷ 6 × 32.00
- 64.00 g, from 2 mol × 32.00 g/mol
In photosynthesis, how many grams of water are used to make 36.036 g of glucose, Ren?
- 36.04 g, the same mass as the glucose
- 21.62 g, from 1.2 mol × 18.02 g/mol
- 3.60 g, from 0.2 mol of water
In 2H₂ + O₂ → 2H₂O (an equation only), 4.04 g of H₂ meets 32.00 g of O₂. What mass of water forms, Tala?
- 36.04 g, the sum of the reactants
- 4.04 g, the hydrogen alone
- 32.00 g, the oxygen alone
In respiration, 90.09 g of glucose and 96.00 g of O₂ react fully, giving 132.03 g of CO₂. What mass of water forms, Zee?
- 54.06 g, since 186.09 − 132.03 = 54.06
- 132.03 g, matching the CO₂
- 186.09 g, the reactants' total
A sealed jar of baking soda and vinegar weighs 300.00 g. After they react, what does the sealed jar weigh, Ari?
- Less, since the CO₂ gas weighs nothing
- More, since the fizz adds mass
- 300.00 g, since no mass leaves the jar
