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WorksheetWise · Standard · 1097
Balancing chemical equations Work through each question. Show your reasoning where space is provided.
Name: ____________________ · Date: ____________
1. Balance using the smallest positive whole-number coefficients, including 1. Keep every chemical formula unchanged: N2 + H2 → NH3
2. Balance using the smallest positive whole-number coefficients, including 1. Keep every chemical formula unchanged: C2H6 + O2 → CO2 + H2O
3. Balance using the smallest positive whole-number coefficients, including 1. Keep every chemical formula unchanged: H2O2 → H2O + O2
4. Balance using the smallest positive whole-number coefficients, including 1. Keep every chemical formula unchanged: CH4 + O2 → CO2 + H2O
5. Balance using the smallest positive whole-number coefficients, including 1. Keep every chemical formula unchanged: H2 + O2 → H2O
WorksheetWise · en-in · 1/1 WorksheetWise · Standard · 1097
Balancing chemical equations — Answer key Work through each question. Show your reasoning where space is provided.
1. Balance using the smallest positive whole-number coefficients, including 1. Keep every chemical formula unchanged: N2 + H2 → NH3
1 N2 + 3 H2 → 2 NH3
Coefficients, in order: 1, 3, 2. Each element has the same total number of atoms on both sides.
2. Balance using the smallest positive whole-number coefficients, including 1. Keep every chemical formula unchanged: C2H6 + O2 → CO2 + H2O
2 C2H6 + 7 O2 → 4 CO2 + 6 H2O
Coefficients, in order: 2, 7, 4, 6. Each element has the same total number of atoms on both sides.
3. Balance using the smallest positive whole-number coefficients, including 1. Keep every chemical formula unchanged: H2O2 → H2O + O2
2 H2O2 → 2 H2O + 1 O2
Coefficients, in order: 2, 2, 1. Each element has the same total number of atoms on both sides.
4. Balance using the smallest positive whole-number coefficients, including 1. Keep every chemical formula unchanged: CH4 + O2 → CO2 + H2O
1 CH4 + 2 O2 → 1 CO2 + 2 H2O
Coefficients, in order: 1, 2, 1, 2. Each element has the same total number of atoms on both sides.
5. Balance using the smallest positive whole-number coefficients, including 1. Keep every chemical formula unchanged: H2 + O2 → H2O
2 H2 + 1 O2 → 2 H2O
Coefficients, in order: 2, 1, 2. Each element has the same total number of atoms on both sides.
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For English-medium practice in India. A4 paper is selected initially. Use short arithmetic sheets for revision and add your own lesson vocabulary to flashcards. These activities do not claim CBSE, ICSE or state-board alignment. A separate Hindi edition is available in the language selector.