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chemistry > chapter 1 exam > Flashcards

chapter 1 exam Flashcards

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1
Q

What is the study of the composition, structure, properties, and reactions of matter

A

chemistry

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2
Q

What is anything that has mass and occupies space

A

matter

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3
Q

What are stars made of

A

plasma

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4
Q

The quantity of matter in the object

A

mass

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5
Q

what is the space an object occupies

A

volume

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6
Q

what is all matter made of

A

particles

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7
Q

describe solids

A

rigid shape, fixed volume, fixed shape

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8
Q

describe liquids

A

not rigid, no fixed shape, fixed volume

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9
Q

describe gases

A

not rigid, no fixed shape, no fixed volume

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10
Q

what are five quantities

A

length, mass, time, thermodynamic temperature, amount of substance

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11
Q

What system do chemists use

A

metric system

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12
Q

we’re moving up the conversion chart is the exponent negative or positive

A

negative

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13
Q

when moving up on the Conversion chart are you moving left or right

A

left

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14
Q

If asked for a scientific notation what do you use

A

*10^

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15
Q

formula for DMV


A

d=m/v

lm=d•v

v=m/d

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16
Q

how to measure on a ruler

A

round to decimal point of u certainty
if it only measures .1 round .10

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17
Q

sig figs rules

A

digits to count:
all non zeros
don’t count leading zeros
zeros between integers
trailing zeros only if there’s a decimal point, then they’re all counted
all scientific notation (unless in leading zeros)

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18
Q

Name all of the possible physical changes

A

boiling, melting, condensing, vaporizing, subliming, freezing

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19
Q

Name all of the possible chemical changes

A

flammability, neutralization, fermenting, rusting, combusting

20
Q

what are some evidence that a chemical change has occurred

A

bubbling, evolution absorption of heat, emission of light

21
Q

what happens when matter can/can’t be separated

A

can- it’s a mixture
cant-it’s a pure substance

22
Q

What two things can a mixture be

A

homogeneous or hetero generous

23
Q

what two things can pure substances be

A

compounds or elements

24
Q

what is a heterogeneous mixture

A

Mixture that is composed of more than one phase (oil and water, chocolate chip cookies)

25
Q

what is a homogeneous mixture

A

same composition but made of 2 or more materials ( sugar water, air)

26
Q

What are homogeneous materials that have the same composition throughout

A

pure substances

27
Q

what is a substance composed of one type of atom

A

elements

28
Q

 what chemical symbols does an element look like

A

One capital letter which might be followed by a lowercase letter

29
Q

what is a molecule

A

two or more atoms combined

30
Q

what are substances composed of two or more types of elements that combine chemically

A

compounds

31
Q

What’s the difference between mixtures and compounds

A

Mixtures resemble the substances that make it up, compounds don’t.
Compounds have a mass of their combining elements, while a mixture might have a varying mass

32
Q

how to mult/divide sig figs

A

number with least amount of sig figs

33
Q

how to add/subtract sig figs

A

round to the same place value as the number with the least decimal points

34
Q

how to round if the last significant digit before a 5 is odd

A

round up

35
Q

how to round if the last digit before the 5 is even

A

leave as is 3.45=3.4

36
Q

how to generate your own ineqquality

A

use scientific notation to convert then do 1x10^ conversion

37
Q

where does units come from when measuring quantity

A

accepted value

38
Q

how to write out percent

A

whole numbers

39
Q

what is the smallest unit of an element

A

atom

40
Q

is dissolve chemical or physical

A

physical

41
Q

what type of mixture is air,, sugar water, and steel

A

homogeneous

42
Q

what tyoe of mixture is granite, wood, or blood

A

heterogeneous

43
Q

what type of pure susbtance is water, sodium, chloride

A

compound

44
Q

what type of pure substance is gold, aluminum, oxygen

A

elements

45
Q

what does 2 elements make

A

a mixture

chemistry (11 decks)

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