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Questions and Answers
Which of the following is an example of a chemical reaction?
Which of the following is an example of a chemical reaction?
- Boiling water
- Melting ice
- Burning wood (correct)
- Mixing salt and sugar
What is the balanced chemical equation for the reaction between hydrogen and oxygen to form water?
What is the balanced chemical equation for the reaction between hydrogen and oxygen to form water?
- H2O -> H + O
- H2O2 -> H2O
- 2H2 + O2 -> 2H2O (correct)
- H2 + O2 -> H2O
Which of the following is a characteristic of a chemical change?
Which of the following is a characteristic of a chemical change?
- Change in shape only
- Change in state only
- Formation of new substances (correct)
- Reversible process
