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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?
- Mixing salt and water
- Boiling water
- Burning wood (correct)
- Melting ice
What is the product of the chemical reaction between hydrochloric acid (HCl) and sodium hydroxide (NaOH)?
What is the product of the chemical reaction between hydrochloric acid (HCl) and sodium hydroxide (NaOH)?
- Carbon dioxide (CO2)
- Water (H2O) (correct)
- Salt (NaCl)
- Oxygen (O2)
What happens to the mass of substances during a chemical reaction?
What happens to the mass of substances during a chemical reaction?
- Mass decreases
- Mass can either increase or decrease
- Mass increases
- Mass is always conserved (correct)
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