Grade 10 · Science · Chemistry

10th grade Stoichiometry for gas volume and particle counts worksheet

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Stoichiometry for gas volume and particle counts

Grade 10 Science Worksheet

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

50 g of CaCO₃ (molar mass 100.09 g/mol) breaks down: CaCO₃ → CaO + CO₂. What volume of CO₂ forms at STP, using 22.4 L/mol, Ari?
25 g of CaCO₃ (molar mass 100.09 g/mol) breaks down: CaCO₃ → CaO + CO₂. What volume of CO₂ forms at STP, using 22.4 L/mol, Bo?
10 g of CaCO₃ (molar mass 100.09 g/mol) breaks down: CaCO₃ → CaO + CO₂. What volume of CO₂ forms at STP, using 22.4 L/mol, Esme?
4.
In 2 H₂ + O₂ → 2 H₂O, how much O₂ reacts with 44.8 L of H₂ at STP, Jun?
- 44.8 L
- 89.6 L
- 22.4 L
5.
In N₂ + 3 H₂ → 2 NH₃, 1 mol of N₂ reacts fully. What volume of NH₃ forms at STP, Kira?
- 67.2 L
- 44.8 L
- 22.4 L
6.
Why can gas volumes at the same T and P use the mole ratio directly, Luz?
- Gases weigh the same per liter
- Equal volumes hold equal moles
- Gases don't follow ratios
7.
How many water molecules are in 2 mol of water, Milo?
- 6.022 × 10²³
- 1.204 × 10²⁴
- 3.011 × 10²³
8.
How many atoms in all are in 1 mol of NH₃ molecules, Pia?
- 4 × 6.022 × 10²³
- 1 × 6.022 × 10²³
- 3 × 6.022 × 10²³
9.
Which standard does this sheet use for gas volumes, Tala?
- 25 °C and 1 atm: 22.4 L/mol
- 0 °C and 1 atm: 1 L/mol
- 0 °C and 1 atm: 22.4 L/mol
10.
Which route turns molecules of one substance into molecules of another, Zee?
- × 22.4, × ratio, ÷ 22.4
- ÷ molar mass, × ratio, × 22.4
- ÷ 6.022 × 10²³, × ratio, × 6.022 × 10²³

Stoichiometry for gas volume and particle counts. Every version has 10 questions, and the answer key prints on the second page.

I can move between particles, moles, grams and liters of gas at STP on the mole map.
I can use the mole ratio to cross from one substance to another.
I can find a gas volume or a particle count from a given mass, volume or number of moles.
I can state which standard a sheet uses: 0 °C and 1 atm (22.4 L/mol), or IUPAC's 100 kPa (22.7 L/mol).

Standard: HS-PS1-7

STP (this sheet): 0 °C and 1 atm

molar volume: Volume of 1 mol of gas: 22.4 L at STP

Avogadro's number: 6.022 × 10²³ particles per mole

mole ratio: Coefficients from the balanced equation

molar mass: Grams per mole

Your child skipped the mole ratio. The balanced equation's coefficients turn moles of one substance into moles of the other.

Your child used grams as if they were moles. Divide by the molar mass first, then use 22.4 L/mol.

Your child treated liters as moles. At STP, 22.4 L is one mole, so divide liters by 22.4.

What is the most common mistake with stoichiometry for gas volume and particle counts?

Your child skipped the mole ratio. The balanced equation's coefficients turn moles of one substance into moles of the other.

Are these 10th grade science worksheets free to print?

Yes. All 6 printable versions at each level are free to print, with the answer key, and no account is needed.

Every sheet you scan goes into your child’s record: dated, marked and ready for the year-end portfolio. Homeschool records