Matter & Measurments

Question 1

Crystallization

Answer 1

Cooling or evaporating a saturated solution so that crystals of the pure substance are formed & filled out

Question 2

Elements

Answer 2

Substances that cant be broken down into simpler components by physical or chemical process

Question 3

Atoms

Answer 3

the smallest part of an elements that contains properties of that element

Question 4

Gas

Answer 4

• Doesnt have a fixed volume & has a indefinite shape (Its volume varies with temp & Pressure where it can be compressed)
• Has rotational, Translational, & Vibrational motion

Question 5

Colloids

Answer 5

Mixture of an intermediate particle size between a solution & a suspenison having a dispered phased

Question 6

Centriguation

Answer 6

Seperations of solids & liquids with similar densities from a heteregenous mixture by spinning it

Question 7

Electrophoresrs

Answer 7

Uses the migration of ions in electric field, seperator of ions by size & Charge

Question 8

Formula Units

Answer 8

Combination of atoms in ionic compounds (High Boiling & Melting Points)

Question 9

Extensive Properties

Answer 9

Properties that depend on the amount of matter present

Question 10

Examples of Physical Changes

Answer 10

Melting & Boiling

Question 11

Chemical Properties

Answer 11

Properties of matter that changes the composition of the substance

Question 12

What is Density?

Answer 12

Density = mass / volume (Units usually g/cm^3)

Question 13

Intensive Properties

Answer 13

Properties that don’t depend on the amount of matter present

Question 14

Relative Deviation

Answer 14

Represents the fractional deviation for a set of data

Relative Dev. = Avg. Absolute Dev./ Mean Value x 100

(Represents Precision)

Question 15

Precision

Answer 15

Depuplication of results where its measured to see how accurate the values are

Question 16

Volume if a Cube

Answer 16

Volume = S²

Question 17

Standard Deviation

Answer 17

Used to express the precision in a set of values (Small deviation- the numbers are close to each other which shows good precision , where more spread out values means less precise)

Question 18

Plasma

Answer 18

Highly ionized gas where the electrons are gone allowing for free movements of charges

Question 19

What are the two parts logarithms are compressed of?

Answer 19

1. Characteristic - digits to the left of the decimal point
2. Mantissa - Digits to the right of the demical point

Question 20

Distillation

Answer 20

Speration of two liquids or solids in a liquid from each other through the difference in bnoiling points (Heating or Cooling the liquids)

Question 21

Indeterminate Errors

Answer 21

Random Errors caused by the equipment or the person using it (Uncertainites)

Question 22

Mean or Absloute Deviation

Answer 22

Tells the reader how spread out the values are(Shows precision of the values)

Question 23

Extractions

Answer 23

Separations of two immiscible liquids ( Usually through filtering- which is used to separate particles)

Question 24

Energy is added when ___________ & released when ___________

Answer 24

Added when bonds break apart & and released when bonds are formed

Question 25

Suspenions

Answer 25

A heterogeneous mixture of larger particles having clearly distingishable regions

Question 26

Facts About Logarthims

Answer 26

1. Negative numbers dont have logs 2. The lof of the number greater than 1 is positive while the log of a number less than 1 is negative (The log of zero is always negative)

Question 27

Homogenous Mixtures

Answer 27

Mixtures having parts that can be identified & consists of one or more substance in a phase (Usually referred as a solution)

Question 28

Formula for volume of a Sphere

Answer 28

Volume = 4/3πr²

Question 29

Bose Einstein Condensate

Answer 29

Matter exists at low temps. near absolute zero

Question 30

Chemical Changes

Answer 30

A substance has changed into a new substance

Question 31

Mixtures

Answer 31

Contains two or more substances that are not chemically combined & dont exist in fixed proportions to one another

Question 32

Absolute Error(Absloute uncertainty)

Answer 32

The _+_ value of the measurement (The uncertainity in the tool)

Question 33

Chromatography

Answer 33

Separtion using a mobile phase (Liquids or gas solvent) & stationary phase

Question 34

Liquid

Answer 34

Has a fixed volume where it takes the shpe of its container (Have translational Motion)

Question 35

Example of Intensive Properties

Answer 35

Color, Odor, Melting Point, Density(Specific Gravity), heat of fusion, heat of vaporization temperature, Specific heat, etc

Question 36

Purified

Answer 36

Separting a mixture into its pure components, elements, or / & compounds

Question 37

Quantitative Measurements

Answer 37

Measurements that involves numerical information

Question 38

Accuracy

Answer 38

How close a values are to the actual value

Question 39

Examples of Extensive Properties

Answer 39

Size, Volume, Mass, Weight, Length, Solubility, etc

Question 40

What is matter?

Answer 40

Anything that take up space & has mass (SI unit kg or grams)

Question 41

Solids

Answer 41

Has a rigid shape & fixed volume that changes very little as temp & pressure changes

Question 42

Pure Substances

Answer 42

Substances made of only of one type matter (Either elements or compounds, giving it a unqiue set of properties that can be identified)

Question 43

Qualitative Measurements

Answer 43

Measurements based on word description

Question 44

Compounds

Answer 44

Combinations of elements that can be broken down into individiual elements

Question 45

Physical Changes

Answer 45

The identity of the substance remains unchanged even though the physical state changed( Like the size, shape or phase its in)

Question 46

Determinate Errors

Answer 46

Systemic errors where its errors are within the machine or tool being used

Question 47

Variance

Answer 47

It measures how far a set of numbers are spread out from their average value

Question 48

Relative Error(Relative Uncertainty)

Answer 48

Ratio of the absolute error of the value of the measurement

Question 49

What is Weight?

Answer 49

a measure of gravitational pull on a substance

Question 50

Formula for Volume of rectangle

Answer 50

Volume = Length x Width x Height

Question 51

Filament

Answer 51

Matter exist at very high temps (So high nucleus can collaspe)

Question 52

Molecules

Answer 52

The small part of non-covalent Compounds

Question 53

Volume of a Cylinder

Answer 53

Volume = πr²h