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

11.63 Combustion and Hydrocarbon Reactions Worksheet

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Worksheet Overview & Skills Covered

Core academic competencies and curriculum alignment

This Chemistry Science worksheet provides structured practice on 11.63 Combustion and Hydrocarbon Reactions. Students are guided through targeted exercises that build foundational understanding, computational accuracy, and critical thinking skills.

Combustion and Hydrocarbon Reactions: Predict and balance complete and incomplete combustion reactions and connect combustion to energy and environmental impacts. 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 - Combustion and Hydrocarbon Reactions 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 11.63 Combustion and Hydrocarbon Reactions skill assessments:

Problem 1Difficulty: Mastery

Which explanation best connects balancing, energy, and environmental impacts of hydrocarbon combustion?

ABalanced equations prove combustion has no environmental products because atoms disappear as heat.

BComplete combustion means carbon becomes oxygen, so CO2 is not related to the fuel.

CIncomplete combustion is safer because it uses less oxygen and makes less CO2 in the equation.

DBalanced equations conserve atoms and show that complete combustion releases energy while producing CO2 and H2O; limited oxygen can add CO or soot hazards.

Solution & Explanation:A strong explanation preserves atoms, uses coefficients for ratios, recognizes energy release, and distinguishes cleaner complete combustion from CO and soot risks under limited oxygen.

Problem 2Difficulty: Mastery

In 2C8H18 + 25O2 → 16CO2 + 18H2O, why is 25 the correct coefficient for O2?

AThere are 25 atoms in one octane molecule.

BThe reactants need 25 carbon atoms to match the products.

CThe products contain 50 oxygen atoms total, which require 25 O2 molecules.

DThe coefficient 25 is chosen only to avoid fractions, not to conserve oxygen.

Solution & Explanation:The products have 16CO2, or 32 oxygen atoms, plus 18H2O, or 18 oxygen atoms. That is 50 oxygen atoms, supplied by 25 O2 molecules.

Problem 3Difficulty: Mastery

Complete combustion of 0.100 mol of a hydrocarbon forms 0.200 mol CO2 and 0.300 mol H2O. What is the molecular formula?

ACH3

BC2H6

CC2H3

DC3H6

Solution & Explanation:The compound has 0.200/0.100 = 2 carbon atoms. It has 2 × 0.300/0.100 = 6 hydrogen atoms, so the formula is C2H6.

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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.).