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

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Electron

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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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FAQs

What are the smallest particles into which an element may be broken down without changing the identity of the element? ›

Atoms are the smallest particles of an element that retain its properties. Atoms have a radius of less than 1 nanometer and vary in size among elements. Atoms are composed of protons, neutrons, and electrons arranged in the nucleus. Atoms are neutral in charge with equal numbers of protons and electrons.

Which contains more energy, 25g of boiling water at 100 C or 25g of steam at 100 C? ›

Steam at 100 degree Celsius has more energy than water at 100 degree Celsius because it takes energy to break the bonds that keep it liquid. Latent heat is the heat released or absorbed by a chemical substance or a thermodynamic system during a change of state that occurs without a change in temperature.

What is the only particle that changes the element? ›

If you change the number of protons, you completely change the element. Each element has a certain number of protons.

What Cannot be broken down into smaller particles? ›

According to the law of conservation of energy, matter cannot be created or destroyed. Hence atoms cannot be destroyed or broken down into smaller particles. These can be separated or rearranged by chemical reactions. Thus, atoms cannot be broken down into smaller particles.

What is the amount of heat needed to convert 190.0 g of liquid water at 18 C to 100 C? ›

The specific heat capacity of water liquid is 4.184 J g . o C . Thus, 494.6 kJ heat is needed to convert 190.0 g of liquid water at 18 degrees Celsius to steam at 100.0 degrees Celsius.

Which produces more severe burns boiling water or steam at 100 C? ›

Steam produces more severe burns. This is because, even though both boiling water and steam are of the same temperature [ 1000c] , the steam contains the extra latent heat of vapourisation. So. steam produces more severe burns.

Which has more energy boiling water or steam? ›

Steam has more energy than boiling water. Q. Statement: Water vapour causes more burning sensation than boiling water at the same temperature. Reason: Water vapour has more energy than boiling water due to the latent heat of vaporization.

What is the smallest part of an element that can be broken down? ›

An atom is the smallest particle of an element, having the same chemical properties as the bulk element. The first accurate theory explaining the nature of matter was Dalton's Atomic Theory: 1.

What is the smallest particle into which an element can be divided without losing its identity? ›

An atom is the smallest particle into which an element can be divided without losing its chemical identity. Atoms consist of a heavy central nucleus surrounded by a cloud of negatively charged particles called electrons.

What is the smallest unit that an element can be broken down into? ›

An atom is the smallest unit of an element that upholds all of the properties of that element. Atoms are made up of subatomic particles called protons, neutrons, and electrons. Protons and neutrons are located in the nucleus of an atom and determine the atomic mass of an atom.

What is the smallest particle into which a substance may be broken? ›

The smallest indivisible particle of an element is an atom.

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