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A substance that speeds up the rate of a chemical reaction is called a. a catalyst. b. a lipid. c. a molecule. d. an element.
asked
Feb 25, 2017
Chemistry
high-school
2
answers
3
votes
22.6k
views
What is the value of the expression? 4 to the second power plus 3 to the 3rd power
asked
Aug 20, 2016
Mathematics
middle-school
2
answers
1
vote
23.8k
views
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