Stoichiometry: from grams of one substance to grams of another
Grade 10 Science Worksheet - Building Confidence
Circle the best answer, or write your answer on the line.
The first step from grams of glucose to grams of CO₂: change 90.09 g of glucose (180.18 g/mol) into moles. How many moles, to 0.01 mol, Ari?
The first step from grams of baking soda to grams of CO₂: change 8.401 g of baking soda (84.01 g/mol) into moles. How many moles, to 0.01 mol, Bo?
The first step from grams of O₂ to grams of water: change 64 g of O₂ (32 g/mol) into moles. How many moles, to 0.01 mol, Kira?
On the mole map, what is the first step from grams of glucose to grams of CO₂, Jun?
- Multiply the grams of glucose by 6
- Divide the grams of glucose by 180.18 g/mol
- Divide the grams of glucose by 44.01 g/mol, CO₂'s molar mass
What is the last step from moles of CO₂ to grams of CO₂, Milo?
- Multiply by 6 mol CO₂ ÷ 1 mol glucose again
- Multiply by 180.18 g/mol, glucose's molar mass
- Multiply by 44.01 g/mol
In respiration, 180.18 g of glucose reacts with 192.00 g of O₂. What total mass of CO₂ and water forms, Noah?
- 372.18 g, the same total as went in
- 192.00 g, the mass of the oxygen
- 180.18 g, the mass of the glucose that went in
84.01 g of baking soda reacts with 60.06 g of vinegar's acid. The products total how many grams, Pia?
- Less than 144.07 g, since some mass is destroyed
- 84.01 g, the baking soda's mass
- 144.07 g, as mass is conserved
A sealed bag of baking soda and vinegar weighs 250 g before mixing. What does it weigh after the fizzing stops, Ren?
- More than 250 g, since new substances form
- 250 g, since the gas stays in the bag
- Less than 250 g, since gas has no mass
To change moles of CO₂ into grams, which molar mass do you use, Tala?
- 180.18 g/mol, glucose's
- 22.4 g/mol
- 44.01 g/mol, CO₂'s own
To change grams of water made into moles, which molar mass do you use, Zee?
- 32.00 g/mol, oxygen's
- 2.02 g/mol, hydrogen's
- 18.02 g/mol, water's own