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If a chemical change requires energy, which of the following could be the source of the energy?
Produce new substances
A color change can be from a physical change or a chemical change.
reactivity
warming ice to produce water
The total mass of the reactants equals the total mass of the products.
They are rearranged.
heating with a flame
evaporation
A color change happens during an experiment mixing two liquids. Is this a physical change or chemical change?
Produce new substances
A color change can be from a physical change or a chemical change.
reactivity
warming ice to produce water
The total mass of the reactants equals the total mass of the products.
They are rearranged.
heating with a flame
evaporation
Which of the following is a chemical property?
Produce new substances
A color change can be from a physical change or a chemical change.
reactivity
warming ice to produce water
The total mass of the reactants equals the total mass of the products.
They are rearranged.
heating with a flame
evaporation
Which of the following occurs in every chemical reaction?
Produce new substances
A color change can be from a physical change or a chemical change.
reactivity
warming ice to produce water
The total mass of the reactants equals the total mass of the products.
They are rearranged.
heating with a flame
evaporation
Which of the following is a physical change?
Produce new substances
A color change can be from a physical change or a chemical change.
reactivity
warming ice to produce water
The total mass of the reactants equals the total mass of the products.
They are rearranged.
heating with a flame
evaporation
What is an example of adding energy to a substance and causing a physical change?
Produce new substances
A color change can be from a physical change or a chemical change.
reactivity
warming ice to produce water
The total mass of the reactants equals the total mass of the products.
They are rearranged.
heating with a flame
evaporation
You are asked to explain what happened to individual atoms when a chemical change takes place in a lab you are doing in class. What is the best explanation?
Produce new substances
A color change can be from a physical change or a chemical change.
reactivity
warming ice to produce water
The total mass of the reactants equals the total mass of the products.
They are rearranged.
heating with a flame
evaporation
Chemical reactions-
Produce new substances
A color change can be from a physical change or a chemical change.
reactivity
warming ice to produce water
The total mass of the reactants equals the total mass of the products.
They are rearranged.
heating with a flame
evaporation
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