Chemical Reactions pt. 2
General questions about chemical reactions. 15 Questions.
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What has occurred when a new substance is formed?
What are the substances that exist before a chemical reaction occurs?
Which of the following is not an example of a chemical reaction?
enzymes in the body breaking down food
tearing a sheet of paper
In the following equation, which one is the product?H + S --> H2S
What are the substances formed after a chemical reaction has occurred?
When balancing a chemical equation, which of the following is false?
Subscripts can never be changed.
Subtracting molecules is not possible.
Coefficients can only be added to the reactants.
What tells you the number of atoms of each element in a compound?
What is needed to start a chemical reaction?
What tells us how fast a reaction occurs?
rate of reaction
Which of the following would NOT increase the rate of reaction?
increasing the temperature
increasing the surface area
adding an inhibitor
What of the following is NOT true about catalysts?
speed up the rate of reaction
are not included in the chemical equation
Which of the following is true about enzymes?
they are catalysts
they are only found in chemicals
they can only speed up reactions
Which of the following is an example of an enzyme?
What type of chemical reactions release heat?
Which of the following is an example of an endothermic reaction?
starting a fire
using a cold pack on an injury
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