Section 1&2

Question 0

Law of conservation of mass

Answer 0

Lavoisier

Mass is neither created nor destroyed

Question 1

Law of Multiple Proportions

Answer 1

Dalton. When two elements can form multiple compounds. Ratios can always be reduced to small whole numbers

Question 2

Characteristics of pure substances

Answer 2

Compound- decompose into simpler substances by chemical changes.
Element- cant be decomposed into simpler substances by chemical changes

Question 3

Heterogeneous mixture

Answer 3

Visibly distinguishable parts colloid

Question 4

Homogeneous mixture

Answer 4

Visibly distinguishable parts; solution. Looks the same but can be separated by physical means.

Question 5

Compressibility

Answer 5

Condition that the volume of a closed system decreases as the pressure on its surfaces increases.

Question 6

Diffusion

Answer 6

Spontaneous migration of substance from regions where their concentration is high to regions where their concentration is low.

Question 7

Plasma

Answer 7

Most abundant state of matter in the universe

Question 8

Liquid

Answer 8

Def volume but no specific shape. Shape of container

Question 9

Solid

Answer 9

Rigid vibrating molecules. Fixed volume and shape.

Question 10

Gas

Answer 10

No fixed volume or shape. Shape and volume of container.

Question 11

Matter

Answer 11

Anything occupying space and having mass.

Question 12

Independent

Dependent

Answer 12

Manipulated variable

Change as result of the changes made in the independent variable

Question 13

Steps of scientific method

Answer 13

Problem/question
Observation/research
Formulate a hypothesis
Experiment
Collect and analyze results
Conclusion
Communicate results 
Make recommendations

Question 14

Fundamental steps of scientific method

Answer 14

Observation
Hypothesis
Experiment

Question 15

Volume formula

Answer 15

V=m/d

Question 16

Mass formula

Answer 16

M=v*d

Question 17

Density formula

Answer 17

D=m/v

Question 18

Metric system

Answer 18

M x x k x x base d c m x x u x x n x x p

Question 19

Accuracy

Answer 19

How close a measurement is to the true value of the quantity being measured

Question 20

Precision

Answer 20

How closely two or more measurements of the same quantity agree with each other

Question 21

Convert Fahrenheit to Celsius

Answer 21

C=5/9 (f-32)

Question 22

Sig figs

Answer 22

Numbers in a measurement that represent the certainty of the measurement plus one number representing an estimate

Question 23

Meniscus

Answer 23

Bottom of a liquid curve

Question 24

Uncertain digit

Answer 24

Digit that must be estimated

Question 25

Law of definite proportion

Answer 25

Proust

Given compound always contains exactly the same proportion of elements by mass

Question 26

Avagadros hypothesis

Answer 26

At the same t and p equal volumes of different gases contain the same number of particles.

Question 27

Gay lussac

Answer 27

Measured the volumes of gases that reacted with each other under the same conditions of t and p

Question 28

Dalton’s atomic theory

Answer 28

Elements made up of tiny particles called atoms.

Atoms of an element are identical diff elements have diff properties.

Question 29

Chemical change

Answer 29

Given substance becomes a new substance or substance with diff prop and composition.

Question 30

Physical change

Answer 30

Change in the form of a substance not chemical composition.
Can separate a mixture into pure compound.
-filtration
-distillation
-chromatography

Question 31

Pure substance

Answer 31

Fixed composition. Can only be changed by chemical methods.

Question 32

Characteristic of mixture

Answer 32

Retain characteristic properties.

Separated into pure substances by physical methods.

Question 33

Mixture

Answer 33

Two or more substances that are not chemically combined.

Question 34

Oxyacids?
In water
Not in water

Answer 34

Contain oxygen.
ends in ite change to ous acid. Ate change to if acid.
Hydrogen name of anion