Chemical Reactions and Equations Quiz
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Preview questions
1. What is a chemical reaction?
A change in state of matter · A process where substances combine or break apart · A physical change · A measurement of temperature
2. Which of the following is a sign of a chemical reaction?
Change in shape · Change in color · Change in volume · Change in temperature only
3. In a chemical equation, the substances that undergo change are called:
Products · Reactants · Catalysts · Solvents
4. What does the law of conservation of mass state?
Mass can be created or destroyed · Mass is always conserved in a chemical reaction · Mass can change forms · Mass is irrelevant in chemical reactions
5. Which of the following equations is balanced?
H2 + O2 → H2O · 2H2 + O2 → 2H2O · H2 + O2 → 2H2O · H2 + O2 → H2O2
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