Abeka 11th Grade Chemistry Test 3 (Nine Weeks Exam) Flashcards | Knowt (2024)

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Chemistry11th

106 Terms

1

Electron

a negatively charged subatomic particle

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2

HF

Name compound for hydrogen fluoride

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3

CaCO3

Name compound for calcium carbonate

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4

H2

Out these gasses which will diffuse fastest? (H2, CH4, + C3H8)

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5

Density

The ratio of mass to volume

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6

Pb

Atomic symbol of lead

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7

Diffusion

Process that causes one substance to mix completely with another, such as dye mixing with water.

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8

3H2 (g) + N2 (g) ---> 2NH3 (g)

Balance: H2 (g) + N2 (g) ---> NH3 (g)

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9

2Al (s) + 6hcl (aq) ---> 2AlCl3 (aq) + 3H2

Balance: Al (s) + HCl (aq) ---> AlCl3 (aq) + H2 (g)

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10

The volume decreases until it becomes 0 Kelvins

According to ideal gas laws, what happens when a gas is cooled to absolute zero at constant pressure?

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11

Water freezing, Ice melting, and water evaporating

Name 3 types of physical properties

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12

C5H7

Empirical formula of beta carotene

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13

Open ended manometer

1,000

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14

List an example of chemical change

Browning meat

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15

Three fewer electrons than a neutral gold atom

How many electrons does Gold III have?

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16

Gas molecules are in constant motion, undergo elastic collisions, are directly related to temperature, are far apart, and have a neglible attraction

List all 5 steps of the Assumption of the Kinetic Theory of Matter.

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17

Significant figures

Rules of _________ _____________: *Zeros between digits (6,053) are significant *Zeros after a decimal are significant (8.9007) *Zeros at the beginning of a number are NOT significant (078) *Zeros at the end of a nondecimal number are NOT significant (31,990)

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18

Avogadro's Law

States the molar volume of a gas is constant if equal volumes of gases at constant temperatures and pressures contain equal numbers of molecules.

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19

Combination reaction

Name reaction: A + B ---> AB

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20

Decomposition reaction

AB ---> A + B

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21

Single displacement reaction

A + BC ---> B + AC

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22

Double displacement reaction

Name reaction: AB + CD ---> AD + BC

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23

CuCl2

name copper chloride as a compound

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24

Nucleus

Central part of an atom

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25

Accuracy

How close a measurement is to the exact value

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26

Liquid state of matter

When particles have enough kinetic energy to move freely, but not enough to overcome their attraction for each other, what state is this?

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27

Amount of force exerted upon a surface per unit of area

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28

Barometer

Instrument used to measure the atmospheric pressure of the earth

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29

-273.15 kelvins and 760 torr

Name the temperature that equals 0 Kelvins

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30

10^-6 seconds

Microsecond

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31

Hypothesizing

Step of the scientific method in which you develop an idea about how something works

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32

Carbon 12

The isotope where the atomic mass unit is defined relative to

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33

760 torr

The standard atmosphere equals what?

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34

Atomic number

Number of protons in an atom

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35

1 torr

What does one millimeter of mercury equal?

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36

Quarks

Protons and neutrons are composed of even smaller particles called?

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37

Avogadro's number

Link between the microscopic and macroscopic levels of chemistry

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38

Si

Atomic symbol for Silicon

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39

15 dm

1.5 m equals?

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40

5.3 kg

5300 g equals?

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41

Science of extracting metals from their ores and preparing them for use is known as

metallurgy

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42

Substances that dissolve in water to produce ions that can conduct an electrical current

electrolytes

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43

The effect of changes on equilibrium systems is described by what principle

Le Chatelier's

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44

The study of reaction rates and pathways

chemical kinetics

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45

activation energy

Minimum kinetic energy that a molecule must possess to undergo a chemical reaction is the

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46

A substance that increases the rate of a chemical reaction without being consumed in the reaction is a

catalyst

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47

Most abundant element in the universe

hydrogen

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48

Protium, deuterium and tritium are common names for what

hydrogen isotopes

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49

Gas found in air that is necessary for the survival of humans and animals

Oxygen

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50

Halogen used in dental hygiene and in the manufacture of refrigerants

florine

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51

Extracted from petroleum and natural gas by the claus process

sulfur

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52

Halogen used in the disinfection of drinking water and the synthesis of medicines, crop - protection chemicals, and pvc plastics.

chlorine

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53

Noble gas used as a lifting gas in airships and weather balloons,

helium

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54

Extracted from the air and used to make artificial fertilizers and explosives

nitrogen

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55

Ozone is an allot rope of this element

oxygen

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56

Exists in an unstable white allot rope and a more stable red allot rope; used to make matches and some fertilizers

phosphorus

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57

Alkali metal found in lye, washi g soda, baking soda and table salt

sodium

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58

Cheapest and most widely used metal, also the 2nd most abundant metal in the earth's crust

iron

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59

Precious metal used in automotive and industrial catalysts

platinum

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60

Metal most commonly refined by means of blast furnaces

iron

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61

Metal used in electrical wiring and as a component of brass and bronze

copper

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62

Lightweight metal widely used to make aircraft, spacecraft, and beverage cans; the most abundant metal in the earth's crust

aluminum

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63

Most malleable and ductile metal known

gold

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64

Most common semi metal; found in computer chips, glads, and sand

Silicon

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65

Alkaline earth metal that helps compose limestone, slaked lime, and cement

calcium

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66

Diluting reactant concentrations WOULD or WOULD NOT increase the rate of a chemical reaction

would not

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67

A solution that contains as much dissolved solute as possible under equilibrium conditions is said to be?

saturated

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68

True or false: A catalyst increases the reaction rate by lowering the reaction's activation energy.

true

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69

solvent

In a solution of sodium chloride in water, water is the?

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70

The flow of solvent through a semipermeable membrane from a more dilute solution to a more concentrated solution is called

osmosis

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71

A mixture of 2 or more metals, usually melted together, is a(n)

alloy

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72

If the temperature of a chemical reaction is increased from 20°C to 30°C, we would ordinarily expect the reaction rate to?

double

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73

The theory that when 2 molecules collide and chemically react they form a short-lived activated complex before breaking apart to form the products is the ? theory.

transition state

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74

The rate of a chemical reaction is usually measured as

The change in concentration of a substance over an amount of time

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75

Rates of forward and reverse reactions are equal is called

equilibrium

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76

A mixture containing tiny clumps or particles that remain suspended within the mixture and will not settle out is a/an

Colloids

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77

What's the most abundant element in the universe and its isotopes?

hydrogen

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78

What's used in dental hygiene

fluorine

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79

What's the science of extracting metals from their ores and preparing them for use

metallurgy

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80

what's the most malleable?

gold

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81

substances being dissolved in solution

solute

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82

whats on way to diffuse/semipermeate

osmosis

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83

most abundant element

oxygen

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84

most versatile elements(crop...)

chlorine

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85

most commonly refined, blast furnace

iron

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86

alloy with mercury for dentistry for teeth fillings

silver

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87

substance that dissolves

solvent

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88

colloids

mixture with tiny clumps or particles remain suspended

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89

forms of the same element that differ in their properties but exist in the same physical state?

allotropy

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90

noble gas is used for lighting gas

helium

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91

mixture of two or more metals

alloy

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92

most abundant element of metal

iron

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93

how does increasing temp effect solubility of gas in a liquid?

decreases

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94

2 parts of chem. kinematics

pathway and reaction rate

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95

as a rule of thumb, by 10 degrees

increases

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96

what alkali is found in baking soda

sodium

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97

what states that a given temp the equilibrium of concentration of a dissolved gas is directly proportional to the partial pressure of that gas?

Henry's law

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98

atmospheric oxygen and ozone

what are 2 allotropes of oxygen

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99

what method is used to extract sulfur from petroleum and natural gas?

Claus Process

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100

what semi-metal is found in glass and computer chips?

silicon

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