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Questions and Answers
Which of the following statements is true about chemical reactions?
Which of the following statements is true about chemical reactions?
- They only occur in the presence of heat
- They always result in the formation of a gas
- They can only happen in a laboratory setting
- They involve the formation or breaking of chemical bonds (correct)
What is the purpose of balancing a chemical equation?
What is the purpose of balancing a chemical equation?
- To make the equation look more symmetrical
- To ensure that the equation obeys the law of conservation of mass (correct)
- To indicate the stoichiometric coefficients of the reactants and products
- To make the equation easier to understand
Which of the following is an example of a chemical reaction?
Which of the following is an example of a chemical reaction?
- Dissolving salt in water
- Boiling water
- Melting ice
- Burning wood (correct)
Which of the following is true about chemical reactions?
Which of the following is true about chemical reactions?
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Which of the following is an example of a chemical reaction?
Which of the following is an example of a chemical reaction?
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What is the purpose of balancing a chemical equation?
What is the purpose of balancing a chemical equation?
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