Free Printable WorksheetScienceGrade 11Science CurriculumNGSS HS-PS1-2, HS-PS1-7; AP Chem Unit 4; Pre-AP Unit 4; CCSS HSN-Q.A.1-3, MP2, MP6

11.68 Mass Mass and Mole Mass Stoichiometry Worksheet

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Worksheet Overview & Skills Covered

Core academic competencies and curriculum alignment

This Chemistry Science worksheet provides structured practice on 11.68 Mass Mass and Mole Mass Stoichiometry. Students are guided through targeted exercises that build foundational understanding, computational accuracy, and critical thinking skills.

Mass-Mass and Mole-Mass Stoichiometry: Solve stoichiometric problems that convert among grams, moles, particles, and chemical equation coefficients. Aligned to NGSS, CCSS, AP Chemistry/Pre-AP Chemistry, and representative state chemistry framework crosswalks: NGSS HS-PS1-2, HS-PS1-7; AP Chem Unit 4; Pre-AP Unit 4; CCSS HSN-Q.A.1-3, MP2, MP6 - Mass-Mass and Mole-Mass Stoichiometry Chemistry Standards Crosswalk: National: NGSS HS-PS1-2, HS-PS1-7; AP Chem Unit 4; Pre-AP Unit 4; CCSS HSN-Q.A.1-3, MP2, MP6. State frameworks: TX TEKS 112.43(c)(9), (11), (12); FL SC.912.P.8.7-8.10; MA HS-PS1-9(MA), HS-PS1-10(MA); CA/NY/NJ HS-PS1-7; GA/VA reaction and stoichiometry standards.

Whether you are an educator preparing classroom handouts, a tutor reinforcing weekly topics, or a parent supporting homeschool learning, this printable resource gives students the deliberate practice required to achieve subject fluency and master state standards.

Grade

Chemistry

Subject

Science

Domain

Science Curriculum

Formats

PDF & DOCX

Sample Practice Problems

Preview the types of problems and questions covered in this worksheet

Below are sample questions representative of the exercises included on this worksheet and related 11.68 Mass Mass and Mole Mass Stoichiometry skill assessments:

Problem 1Difficulty: Mastery

For 2 Cu(s) + O2(g) -> 2 CuO(s), convert 12.7 g of Cu to particles of CuO. Use Cu = 63.55 g/mol and 6.022 x 10²³ particles/mol.

A9.61 x 10²² formula units

B7.65 x 10²⁴ formula units

C2.41 x 10²³ formula units

D1.20 x 10²³ formula units

Solution & Explanation:Convert 12.7 g Cu to moles, use the mole ratio 2 mol CuO/2 mol Cu, then multiply by 6.022 x 10²³ to get formula units of CuO. The result is 1.20 x 10²³ formula units. The coefficient ratio must be applied before converting to particles.

Problem 2Difficulty: Mastery

A particle-level model starts with 1.807 x 10²⁴ molecules of SO3. For 2 SO2(g) + O2(g) -> 2 SO3(g), what mass of O2 is represented? Use O2 = 32.00 g/mol and Avogadro's number.

A96.0 g

B192 g

C48.0 g

D120 g

Solution & Explanation:Convert particles to moles with Avogadro's number, use the mole ratio 1 mol O2/2 mol SO3, then convert moles of O2 to grams: 1.807 x 10²⁴ molecules SO3 -> 48.0 g. The particle count must pass through moles before a mass is found.

Problem 3Difficulty: Mastery

For the balanced equation 2 NaHCO3(s) -> Na2CO3(s) + CO2(g) + H2O(g), what mass of Na2CO3 is produced from 0.250 mol of CO2? Use molar mass Na2CO3 = 105.99 g/mol. Report to 3 significant figures.

A11.0 g

B26.5 g

C53.0 g

D13.2 g

Solution & Explanation:Use the mole ratio from the balanced equation, then convert moles of Na2CO3 to grams: 0.25 mol CO2 x (1 mol Na2CO3/1 mol CO2) x 105.99 g/mol = 26.5 g. The coefficients, not subscripts, set the mole ratio.

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Frequently Asked Questions

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QWhat grade level and standards does this worksheet align with?

This worksheet is designed specifically for Chemistry Science students. It aligns with educational standard NGSS HS-PS1-2, HS-PS1-7; AP Chem Unit 4; Pre-AP Unit 4; CCSS HSN-Q.A.1-3, MP2, MP6 (National: NGSS HS-PS1-2, HS-PS1-7; AP Chem Unit 4; Pre-AP Unit 4; CCSS HSN-Q.A.1-3, MP2, MP6. State frameworks: TX TEKS 112.43(c)(9), (11), (12); FL SC.912.P.8.7-8.10; MA HS-PS1-9(MA), HS-PS1-10(MA); CA/NY/NJ HS-PS1-7; GA/VA reaction and stoichiometry standards.).