chemican reactions

Question 1

a material used to decrease the rate of a chemical reaction

Answer 1

inhibitor

Question 2

helps reactions occur at body temperature

Answer 2

enzymes

Question 3

substance that undergoes a chemical change

Answer 3

reactant

Question 4

a substance formed as a result of a chemical reaction

Answer 4

product

Question 5

energy is absorbed

Answer 5

endothermic reaction

Question 6

reaction that releases energy

Answer 6

exothermic reaction

Question 7

the minimum amount of energy needed to start a chemical reaction

Answer 7

activation energy

Question 8

the amount of a substance in a given volume

Answer 8

concentration

Question 9

a solid that forms from a solution during a chemical reaction

Answer 9

precipitate

Question 10

a change that alters the form or appearance of a material but does not make the material into a new substance

Answer 10

physical change

Question 11

a change in which the atoms rearrange to form a new substance

Answer 11

chemical change

Question 12

2 or more reactions form 1 product

Answer 12

synthesis

Question 13

1 reactant forms 2 or more products

Answer 13

decomposition

Question 14

a single element replaces an element already in a compound

Answer 14

single replacement

Question 15

different elements in different compounds replace each other

Answer 15

double replacement

Question 16

name 4 factors the affect the speed of reactions

Answer 16

increase temperature, increase concentration, increase surface area, add a catalyst

Question 17

name a way to slow down a chemical reaction

Answer 17

add an inhibitor

Question 18

increases the reaction rate by lowering the activation energy needed

Answer 18

catalyst