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Questions and Answers
What is the role of a catalyst in a chemical reaction?
What is the role of a catalyst in a chemical reaction?
- Slows down the reaction
- Initiates the reaction
- Remains unchanged at the end of the reaction (correct)
- Increases the yield of products
In a chemical equation, what does the coefficient represent?
In a chemical equation, what does the coefficient represent?
- State of matter of each substance
- Temperature at which the reaction occurs
- Identity of the compound
- Number of atoms of each element (correct)
Which of the following is an example of a chemical reaction?
Which of the following is an example of a chemical reaction?
- Breaking a glass
- Burning of wood (correct)
- Melting of ice
- Mixing of salt in water
Flashcards
Catalyst
Catalyst
A substance that speeds up a chemical reaction without being consumed in the process; it remains unchanged at the end of the reaction.
Coefficient in a chemical equation
Coefficient in a chemical equation
The number placed in front of a chemical formula in a balanced equation to indicate how many molecules or atoms of that substance are involved in the reaction.
Chemical Reaction
Chemical Reaction
A process that involves rearrangement of the structure of molecules. An example is the burning of wood.
Study Notes
Chemical Reactions
- A catalyst is a substance that speeds up a chemical reaction without being consumed or altered in the process.
- In a chemical equation, the coefficient represents the number of molecules or atoms of a reactant or product involved in the reaction.
Examples of Chemical Reactions
- A burning match, rusting of iron, and baking of bread are all examples of chemical reactions.
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