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7. Which of the following pieces of lab equipment is needed to measure the amount of heat released during a chemical change?
C. a thermometer
A. At what temperature will the substances react?
C. In order to produce the desired mass of product, she will need to know the mass of the reactant to use.
A. The mass of the products is equal to the mass of the reactants.
A. A piece of wood burning in a campfire.
C. Gas bubbles are produced.
C. the clouds forming rain from water vapor
C. when a white substance begins to form at the bottom
1. Felipe is observing how acetic acid and sodium bicarbonate react with one another in a volcano model. What evidence can he look for to indicate a chemical reaction has taken place?
C. a thermometer
A. At what temperature will the substances react?
C. In order to produce the desired mass of product, she will need to know the mass of the reactant to use.
A. The mass of the products is equal to the mass of the reactants.
A. A piece of wood burning in a campfire.
C. Gas bubbles are produced.
C. the clouds forming rain from water vapor
C. when a white substance begins to form at the bottom
5. Marlene's family goes on an autumn campout to a local state park. During the camp out she notices several things that could be a chemical change. Which of the following is not a chemical change?
C. a thermometer
A. At what temperature will the substances react?
C. In order to produce the desired mass of product, she will need to know the mass of the reactant to use.
A. The mass of the products is equal to the mass of the reactants.
A. A piece of wood burning in a campfire.
C. Gas bubbles are produced.
C. the clouds forming rain from water vapor
C. when a white substance begins to form at the bottom
10. What is the mass of the products compared to the mass of the reactants? 6CO2 + 6H2O ----- C6H12O6 + 6O2
C. a thermometer
A. At what temperature will the substances react?
C. In order to produce the desired mass of product, she will need to know the mass of the reactant to use.
A. The mass of the products is equal to the mass of the reactants.
A. A piece of wood burning in a campfire.
C. Gas bubbles are produced.
C. the clouds forming rain from water vapor
C. when a white substance begins to form at the bottom
12. A beaker with two liquid compounds is placed on a hot plate and heated. What question can be best answered from this experiment?
C. a thermometer
A. At what temperature will the substances react?
C. In order to produce the desired mass of product, she will need to know the mass of the reactant to use.
A. The mass of the products is equal to the mass of the reactants.
A. A piece of wood burning in a campfire.
C. Gas bubbles are produced.
C. the clouds forming rain from water vapor
C. when a white substance begins to form at the bottom
4. Which of the following is an example of a chemical change?
C. a thermometer
A. At what temperature will the substances react?
C. In order to produce the desired mass of product, she will need to know the mass of the reactant to use.
A. The mass of the products is equal to the mass of the reactants.
A. A piece of wood burning in a campfire.
C. Gas bubbles are produced.
C. the clouds forming rain from water vapor
C. when a white substance begins to form at the bottom
11. Why is it important for a chemist to have a balanced chemical equation for a reaction?
C. a thermometer
A. At what temperature will the substances react?
C. In order to produce the desired mass of product, she will need to know the mass of the reactant to use.
A. The mass of the products is equal to the mass of the reactants.
A. A piece of wood burning in a campfire.
C. Gas bubbles are produced.
C. the clouds forming rain from water vapor
C. when a white substance begins to form at the bottom
8. Susan observes two antacid tablets dropped into water. Bubbles immediately form. When will she know the chemical reaction has stopped?
C. a thermometer
A. At what temperature will the substances react?
C. In order to produce the desired mass of product, she will need to know the mass of the reactant to use.
A. The mass of the products is equal to the mass of the reactants.
A. A piece of wood burning in a campfire.
C. Gas bubbles are produced.
C. the clouds forming rain from water vapor
C. when a white substance begins to form at the bottom
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