Podcast
Questions and Answers
Which statement best describes what happens during a chemical reaction?
Which statement best describes what happens during a chemical reaction?
- Reactants remain exactly the same as the products.
- Heat energy is always absorbed and lost.
- Matter is created or destroyed.
- Atoms are rearranged to form products different from the original reactants. (correct)
What is the role of reactants in a chemical reaction?
What is the role of reactants in a chemical reaction?
- They are found to the right of the arrow in a chemical reaction formula.
- They are not involved in the chemical reaction.
- They go into the chemical reaction and are typically to the right of the arrow.
- They go into the chemical reaction and are typically found to the left of the arrow. (correct)
What is an exothermic reaction?
What is an exothermic reaction?
- A reaction where heat energy is released. (correct)
- A reaction where heat energy is absorbed.
- A reaction where matter is created.
- A reaction where atoms are not rearranged.
Which of the following is NOT an example of a chemical change?
Which of the following is NOT an example of a chemical change?
What is the purpose of indicators in chemistry?
What is the purpose of indicators in chemistry?
During a chemical reaction, what happens to the overall energy?
During a chemical reaction, what happens to the overall energy?
What are products in a chemical reaction?
What are products in a chemical reaction?
In a double-replacement reaction, what do two ionic compounds swap?
In a double-replacement reaction, what do two ionic compounds swap?
Which type of reaction involves the combining of two or more elements and/or substances to create one new substance?
Which type of reaction involves the combining of two or more elements and/or substances to create one new substance?
What is the key characteristic of a decomposition reaction?
What is the key characteristic of a decomposition reaction?
Which type of reaction involves a hydrocarbon reacting with oxygen to produce carbon dioxide and water?
Which type of reaction involves a hydrocarbon reacting with oxygen to produce carbon dioxide and water?
What is the product when a combination reaction occurs between magnesium metal and oxygen gas?
What is the product when a combination reaction occurs between magnesium metal and oxygen gas?
In a single-replacement reaction, a positively charged cation can only be replaced by what type of atom?
In a single-replacement reaction, a positively charged cation can only be replaced by what type of atom?
What characterizes a combustion reaction?
What characterizes a combustion reaction?
Which type of reaction involves one thing breaking down into two or more components?
Which type of reaction involves one thing breaking down into two or more components?
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