Chemistry Test #1

Question 1

Length

Answer 1

Meter

Question 2

Volume

Answer 2

Liter

Question 3

Mass

Answer 3

Gram

Question 4

Dimensional Analysis

Answer 4

Given*(Desired/Given)=Desired

Question 5

Precision

Answer 5

How close a series of measurements are to each other

Question 6

Accuracy

Answer 6

How close a value is to an accepted value

Question 7

Sig Figs

Answer 7

1. All non-zero numbers are always significant
2. Captive zeros are always significant
3. If a decimal point is present, the trailing 0’s are significant
4. If a decimal point is NOT present, trailing 0’s are NOT significant
5. Leading 0’s are not significant

Question 8

Adding/Subtracting Decimal Places

Answer 8

smallest # of decimal places

Question 9

Multiplying/Dividing Sig Figs

Answer 9

the number with fewest sig figs that’s being multiplied is the number of sig figs in the answer

Question 10

mixture

Answer 10

combination of two or more substances in any proportion

Question 11

Compound

Answer 11

Substances in fixed proportions

Question 12

Homogeneous

Answer 12

Same composition throughout

Question 13

Heterogeneous

Answer 13

Varies in its composition

Question 14

Solution

Answer 14

Homogeneous mixture with tiny particles (to small to see/settle or be filtered out.

Question 15

Colloid

Answer 15

Homogeneous mixture with medium-sized particles (big enough to see, to small to settle or be filtered out)

Question 16

Suspension

Answer 16

Homogeneous mixture with large particles (big enough to see & be filtered out)

Question 17

Elements

Answer 17

Substances that are unable to be broken down further, atom is the smallest particle

Question 18

Compounds

Answer 18

Two or more different elements that are chemically combined

Question 19

Phase

Answer 19

Physical Property

Question 20

Color

Answer 20

Physical Property

Question 21

Odor

Answer 21

Physical Property

Question 22

Flammability

Answer 22

Chemical Property

Question 23

Boiling Point

Answer 23

Physical Property

Question 24

Melting Point

Answer 24

Physical Property

Question 25

Density

Answer 25

Physical Property

Question 26

Reactivity

Answer 26

Chemical Property

Question 27

Physical Property

Answer 27

Can be observed/measured without changing the composition

Question 28

Chemical Property

Answer 28

Can only be observed during or after a chemical reaction

Question 29

Chemical Change

Answer 29

a substance becomes another having a different composition & properties
not reversible using ordinary physical means

Question 30

Compunds can be

Answer 30

separated into elements by chemical means

Question 31

Un-mix mixtures through

Answer 31

Filteration, Distillation & a Seperatory Funnel

Question 32

Chromatography

Answer 32

Separating Components in a Mixture

Question 33

Percent Error

Answer 33

(M-A)/A*100