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which of teh following is an example of a chemical change?
Mrs. Hoover holding an ice cube in her hand and it melting
catalyst
It is when it can change but is the same thing you started with
6 atoms of carbon
gases were released into the atomosphere
gold
freezing water and burning coal
Cody setting off a bomb in Mrs. Hoover's class
What is the best example of a pure substance?
Mrs. Hoover holding an ice cube in her hand and it melting
catalyst
It is when it can change but is the same thing you started with
6 atoms of carbon
gases were released into the atomosphere
gold
freezing water and burning coal
Cody setting off a bomb in Mrs. Hoover's class
If a chemical reaction such as photosynthesis begins with 6 atoms of carbon, how many atoms of carbon should be in the products?
Mrs. Hoover holding an ice cube in her hand and it melting
catalyst
It is when it can change but is the same thing you started with
6 atoms of carbon
gases were released into the atomosphere
gold
freezing water and burning coal
Cody setting off a bomb in Mrs. Hoover's class
Which of the following is an example of a physical change?
Mrs. Hoover holding an ice cube in her hand and it melting
catalyst
It is when it can change but is the same thing you started with
6 atoms of carbon
gases were released into the atomosphere
gold
freezing water and burning coal
Cody setting off a bomb in Mrs. Hoover's class
Which best explains why the total mass of the products would be less than the total weight of the reactants after a chemical reaction?
Mrs. Hoover holding an ice cube in her hand and it melting
catalyst
It is when it can change but is the same thing you started with
6 atoms of carbon
gases were released into the atomosphere
gold
freezing water and burning coal
Cody setting off a bomb in Mrs. Hoover's class
Which of the following correctly describes a physical change?
Mrs. Hoover holding an ice cube in her hand and it melting
catalyst
It is when it can change but is the same thing you started with
6 atoms of carbon
gases were released into the atomosphere
gold
freezing water and burning coal
Cody setting off a bomb in Mrs. Hoover's class
Which of the following shows one example of a chemical change and one example of a physical change?
Mrs. Hoover holding an ice cube in her hand and it melting
catalyst
It is when it can change but is the same thing you started with
6 atoms of carbon
gases were released into the atomosphere
gold
freezing water and burning coal
Cody setting off a bomb in Mrs. Hoover's class
If I wanted to speed up a chemical reaction, which of the following would I use?
Mrs. Hoover holding an ice cube in her hand and it melting
catalyst
It is when it can change but is the same thing you started with
6 atoms of carbon
gases were released into the atomosphere
gold
freezing water and burning coal
Cody setting off a bomb in Mrs. Hoover's class
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