Balancing Chemical Equations Quiz

What is the Law of Conservation of Mass?

• Mass is created in a chemical reaction

• Mass is created in a physical change

• New chemicals formed from a chemical reaction have a larger overall mass than the original reactants

• Mass is never created or destroyed

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NGSS.MS-PS1-5

Which of the following models best demonstrates a balanced chemical equation?

• F

• G

• H

• J

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following equations are correctly balanced?

• 12CO₂ + H₂O → C₆H₁₂O₆ + O₂

• CO₂ + H₂O → 3C₆H₁₂O₆ + O₂

• CO₂ + 9H₂O → C₆H₁₂O₆ + O₂

• 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

Is this equation balanced?

• yes

• no

• Not enough information

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

The two (2) is indicating _________.

• subscripts

• reactants

• coefficients

• aqueous

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NGSS.MS-PS1-5

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NGSS.MS-PS1-5

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NGSS.MS-PS1-5

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NGSS.MS-PS1-5

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NGSS.MS-PS1-5