Chemistry Test 1 Questions

Question 1

Please answer thoroughly

What is matter and how matter and how is it measured?

Answer 1

Matter is anything that takes up space and has mass. It is measured in grams or kg and with a triple beam balance.

Question 2

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Define Volume

Answer 2

How much an object can hold and measures its size

Question 3

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How is Volume measured?

Answer 3

water displacement, graduated cylinder, or formula for volume (measuring)

Question 4

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What is a physical property? and give examples

Answer 4

Property that does NOT involve a chemical change. Color, texture, hardness, magnetism

Question 5

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List 6 physical properties

Answer 5

Malleability, ductility, thermal conductivity, state and solulibility

Question 6

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what is a physical change? Give Examples

Answer 6

something that remains the same substance but experiences some sort of change, such as color, odor and feel

Question 7

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What is a chemical property?

Answer 7

An substances’ ability to to participate in a chemical reaction.

Question 8

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List 3 examples of chemical properties and define them.

Answer 8

Flamibility - the ability of a substance to catch on fire, Reactivity to h2o- the ability of two or more substances to combine or form one more more subtances (02 combining with H2O), reactivity with oxygen

Question 9

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what is a chemical change and how do we know if a chemical change has occurred

Answer 9

change in color or odor production of heat fizzing and foaming and sound or light being given off heat production

Question 10

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can physical changes be reversed can chemical changes be reversed

Answer 10

physical changes can be reversed and chemical changes can not

Question 11

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what is a characteristic property

Answer 11

properties that are most useful in identifying a subtance are characteristic property

Question 12

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why is density important to use

Answer 12

it is a very good way to identify subtances

Question 13

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three states of matter

Answer 13

suspension,colliod,and soubility

Question 14

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boyles law

Answer 14

it show that when pressure goes up volume decreases and when volume increases pressure goes down

Question 15

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charles law

Answer 15

the law that states that the volume of gas is dierectly proportional to the temperature of a gas when pressure is constant

Question 16

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know the diffrent phase changes and a what temperature they occur at and weather the reactions are endothermic or exothermic

Answer 16

soild to liquid or a liquid to a soild is enodthermic 0c and 32f and a liquid to gas or a gas to a liquid is 100c 212f

Question 17

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what is the diffrence between boiling and evaporation

Answer 17

evaporation change of a subtance from a liquid to a vapor or gas through out the liquids

Question 18

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how does the boiling point chage relative to sea level

Answer 18

when at higher altitude the boiling point goes down but a lower it is higher

Question 19

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what is sublamation

Answer 19

the process in which a solid changes directly into a gas

Question 20

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what is a pure subtance

Answer 20

one atom or element

Question 21

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what is an element

Answer 21

a subtance that can not be broken down

Question 22

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what is a compond

Answer 22

a subtance made up of two or more atoms of two or more diffrent elements joined by chemical sodium cloride

Question 23

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how are compounds broken down

Answer 23

apply heat energy and chemical changes

Question 24

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what is a mixture

Answer 24

a subtance made up of two or more things that are not chemically combined

Question 25

# Please answer thoroughly three types of mixtures

Answer 25

solubility,supension,and colloid

Question 26

# Please answer thoroughly how do measure solutions

Answer 26

caculate the congretion and solution by measureing the givien of solute salt per milimeter of solvent

Question 27

# Please answer thoroughly what is solubility

Answer 27

the ability for something to be dissolved

Question 28

# Please answer thoroughly how can we increase the solubility of a subtance

Answer 28

stirr it, crush it, and add heat

Question 29

# Please answer thoroughly diffrence between saturated and unsaturated

Answer 29

unsaturatecd solution does not contain the maximum amount of a solute possible ad nsaturated if more solute is added after a solution

Question 30

# Please answer thoroughly what does adding solute do to the boiling point of a solution to the freezing point

Answer 30

it increases it

Question 31

# Please answer thoroughly describe suspension solution colloid

Answer 31

suspension is when the particles in a mixture are large enough to see with your eyes colloidis a mixture that has smaller particles then those of a suspension solution is homogenous mixture form by disolving a solvent into a solve is mixture

Question 32

# Please answer thoroughly what is a isotope

Answer 32

an atom that has the same number of protons as other atoms of the same element do but that has a diffrent number of neutrons

Question 33

# Please answer thoroughly how is mass caculated

Answer 33

in decimals

Question 34

# Please answer thoroughly name the four forces

Answer 34

electromagnetic gravitional stron weak