unit 5

Question 1

what is matter

Answer 1

anything that has mass and volume

Question 2

what is mass

Answer 2

a measure of how much matter is in an object

Question 3

what is volume

Answer 3

how much space an object takes up

Question 4

what is a mixture

Answer 4

2 or more pure sutances combined together

Question 5

what is a homogenous mixture

Answer 5

same through out, cant see any difference

Question 6

what is a heterogeneous mixture

Answer 6

different through out, can see difference in composition

Question 7

what is filtration

Answer 7

separates a solid from a liquid

Question 8

what is distillation

Answer 8

liquids are boiled to produce a vapor, which is then condensed into a liqued

Question 9

what is decanting

Answer 9

pouring one phase from a container and leaving the remaining phase

Question 10

what is chromotography

Answer 10

passing a mixture dissolved in a mobile phase through a stationary phase

Question 11

what are the 6 evidences of chemical change

Answer 11

smell, temperature, precipitate, color, energy, gas is evolved

Question 12

what does it mean when gas is evolved

Answer 12

a gas is given off when solids and or liquids reacts

Question 13

the smell of paper burning is what

Answer 13

an example of a smell during a chemical change

Question 14

iron rusting is an example of what evidence of a chemical reaction

Answer 14

color change

Question 15

what does precipitate is formed mean

Answer 15

a solid is formed from reaction of liquids

Question 16

what dose energy mean for a chemical reaction

Answer 16

can be given off as a light or sound

Question 17

what does endothermic mean

Answer 17

absorbs heat, feels cold

Question 18

what does exothermic mean

Answer 18

releases heat, feels hot

Question 19

what are the chemicals on the left of the equation called

Answer 19

reactants

Question 20

what are the chemicals on the right side of the equation called

Answer 20

products

Question 21

what does the law of conservation of mass state

Answer 21

total mass of a substance in a chemical reaction does not change

Question 22

what is combustion

Answer 22

oxygen combines with another compound to form water and carbon dioxide as well as producing heat

Question 23

what is the general form of combustion

Answer 23

C,H,O,+ O2-> CO2+H2O

Question 24

what is synthesis/combination

Answer 24

two or more elements or compounds combine to form a more complicated one

Question 24

C,H,O,+ O2-> CO2+H2O is the general form for what reaction

Answer 24

combustion

Question 25

what is the general form for synthesis/combination

Answer 25

A+B -> AB

Question 26

A+B -> AB is the general form for what reaction

Answer 26

synthesis/combination

Question 27

what is decomposition

Answer 27

a compound breaks down to make simpler compounds or elements

Question 28

what is the general form for decomposition

Answer 28

AB -> A+B

Question 29

AB -> A+B is the general form for what reaction

Answer 29

decomposition

Question 30

what is single displacement

Answer 30

a single element trades places with an element in a compound

Question 31

what is the general form for single displacement

Answer 31

A + BC -> AC + B

Question 32

A + BC -> AC + B is the general form for which type of reaction

Answer 32

single displacement

Question 33

what is double displacement

Answer 33

the anions and cations of two different molecules switch places, forming two entirely new compounds.

Question 34

what are the 7 diatomics

Answer 34

Br, I, N, Cl, H, O, F

Question 35

when combining elements what do you write first

Answer 35

the metal