PencilGo

Grade 10 · Science · Chemistry

10th grade Stoichiometry for gas volume and particle counts worksheet

6 printable versionsChallenge Me10 questions · answer keyFree · no account

Level: Building Confidence · On Level · Challenge Me

When it’s done, scan the sheet with your phone and PencilGo marks it and picks the next one. Create a free account

Version
Print

Stoichiometry for gas volume and particle counts

Grade 10 Science Worksheet - Challenge Me

NameDate

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

  1. In 2 H₂ + O₂ → 2 H₂O, 11.2 L of O₂ at STP reacts (22.4 L/mol). How many water molecules form, in units of 10²³ (1 mol = 6.022 × 10²³), Ari?

  2. In 2 H₂ + O₂ → 2 H₂O, 5.6 L of O₂ at STP reacts (22.4 L/mol). How many water molecules form, in units of 10²³ (1 mol = 6.022 × 10²³), Bo?

  3. In 2 H₂ + O₂ → 2 H₂O, 33.6 L of O₂ at STP reacts (22.4 L/mol). How many water molecules form, in units of 10²³ (1 mol = 6.022 × 10²³), Esme?

  4. 100.09 g of CaCO₃ breaks down to CaO and CO₂. How many CO₂ molecules form, Kira?

    • 100.09 × 10²³
    • 6.022 × 10²³
    • 1.204 × 10²⁴

  5. What is the mass of 44.8 L of CO₂ at STP (44.01 g/mol), Luz?

    • 88.02 g
    • 44.8 g
    • 44.01 g

  6. Milo says 22.4 L of O₂ at STP is 22.4 mol. Agree or disagree?

    • Agree: liters and moles are the same
    • Agree: O₂ has 22.4 per liter
    • Disagree: it is 1 mol

  7. Noah says 11.2 L of H₂ at STP holds 11.2 × 6.022 × 10²³ molecules. Agree or disagree?

    • Agree: each liter is a mole of molecules
    • Agree: H₂ is the lightest gas
    • Disagree: 11.2 L is 0.5 mol

  8. Pia says 1 mol of CO₂ fills more space than 1 mol of H₂ at STP because CO₂ is heavier. Agree or disagree?

    • Disagree: both fill 22.4 L
    • Agree: heavier gases fill more
    • Agree: CO₂ molecules spread wider

  9. Why must a sheet say which standard it uses for gas volumes, Tala?

    • Molar volume depends on T and P
    • Gases change mass at each standard
    • Moles change with the weather

  10. What volume does 0.25 mol of gas fill at STP (0 °C and 1 atm), Zee?

    • 89.6 L
    • 5.6 L
    • 0.25 L
PencilGopencilgo.com

10th grade Stoichiometry for gas volume and particle counts worksheet – printable
Print: 123456

About this worksheet

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

What your child will learn

  • 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

Words to know

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

Common mistakes

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.

Questions parents ask

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.

More chemistry

See all Chemistry

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

Ready for easier practice?

Print a sheet, scan it when it’s done, and PencilGo picks the next one.

Create a free account