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Chemisty 111 > Test 1 Review > Flashcards

Test 1 Review Flashcards

1
Q

Matter is divided into how many types?

A

2

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2
Q

What are the two types of matter?

A

Elements and Compounds

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3
Q

What are substances?

A

Material that is chemically the same throughout

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4
Q

What are elements?

A

Substances which can’t be broken down

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5
Q

What are compounds?

A

Substances that can be broken down

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6
Q

What are two examples of elements?

A

Al-Aluminum

As-Arsenic

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7
Q

What are mixtures?

A

Matter which can be seperated by physical methods

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8
Q

What are Heterogenous mixtures?

A

composition changes from one part to another

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9
Q

What are Homogenous mixtures?

A

composition is uniform

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10
Q

What is an alloy?

A

solution of a metal and another material

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11
Q

What are the two things that the confidence of chemistry relies on?

A

Accuracy and Precision

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12
Q

What is accuracy?

A

agreement of measurement with true calue

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13
Q

What is precision?

A

agreement among repeated movement

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14
Q

What are the number of significant figures?

A

of digits from 1st non-zero digit through last reported digit

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15
Q

What are quantities not limited by significant figures?

A

Counted numbers
Defined numbers
Powers of 10 in exponential notation

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16
Q

Trailing numbers without a decimal may not be, and what do we do to combat this?

A

signficant, and we use scientific notation to combat this

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17
Q

Uncertainty is at least +/- __ unit in the last digit.

A

1

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18
Q

Zeros which proceed the first non zero digit are?

A

not significant

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19
Q

A zero is only significant if?

A

proceeded by a non-zero digit

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20
Q

In addition and subtraction, what is the least certain?

A

The number with the least number of decimal places

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21
Q

In multiplication and division, what is the least certain?

A

The number with the least significant figures

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22
Q

Your reported answer for Uncertainty in Multiplication and Division should have?

A

no more significant figures than the least accurate number

23
Q

What are the rules for rounding methods?

A

Less than 5, round down
5, round to even
More than 5, round up

24
Q

What is the SI system?

A

a system adopted by the scientific community to alloq for easy comparison of measurements

25
Q

The SI system is a outgrowth of?

A

The metric system

26
Q

Basic Units in the SI System-
What is the Unit and Abbreviation for the following:
Length

A

Meter/m

27
Q

Basic Units in the SI System-
What is the Unit and Abbreviation for the following:
Mass

A

Kilogram/kg

28
Q

Basic Units in the SI System-
What is the Unit and Abbreviation for the following:
Time

A

seconds/s

29
Q

Basic Units in the SI System-
What is the Unit and Abbreviation for the following:
Temperature

A

kelvin/k

30
Q

Basic Units in the SI System-
What is the Unit and Abbreviation for the following:
Amount

A

mole/mol

31
Q

Basic Units in the SI System-
What is the Unit and Abbreviation for the following:
Electric current

A

ampere/A

32
Q

Basic Units in the SI System-
What is the Unit and Abbreviation for the following:
Luminous Intensity

A

candela/cd

33
Q

Common Prefixes used w/ Si Units-
What is the Abbreviation and meaning of each prefix:
Mega-

A

M 10^6

34
Q

Common Prefixes used w/ Si Units-
What is the Abbreviation and meaning of each prefix:
Kilo

A

K 10^3

35
Q

Common Prefixes used w/ Si Units-
What is the Abbreviation and meaning of each prefix:
centi

A

c 10^-2

36
Q

Common Prefixes used w/ Si Units-
What is the Abbreviation and meaning of each prefix:
mili

A

m 10^-3

37
Q

Common Prefixes used w/ Si Units-
What is the Abbreviation and meaning of each prefix:
Micro

A

u (weird u shaped thing) 10^-6

38
Q

Common Prefixes used w/ Si Units-
What is the Abbreviation and meaning of each prefix:
nano

A

n 10^-9

39
Q

Common Prefixes used w/ Si Units-
What is the Abbreviation and meaning of each prefix:
pico

A

p 10^-12

40
Q

What is a unit conversion factor?

A

a fraction in which the numerator quantity is a quantity equal or equivalent to the quantity in the denominator but expressed in different units

41
Q

What is volume?

A

the product of 3 lengths

42
Q

Since the SI unit for length is meter (m), so what is the standard until for volume?

A

cubic meters

43
Q

What are the two important non-SI units?

A

liter (L) and mililiter (mL)

44
Q

What is density?

A

a physical property of a substance calculated as mass unit per unit volume

45
Q

What are the SI units for density?

A

kg/m^3

46
Q

What are the most commonly used density units-

A

g/cm^3
g/cm^-3
g/ml

47
Q

What are the Solid/liquid/Gas points for?

Kelvin

A

0/273/373

48
Q

What are the Solid/liquid/Gas points for?

Celsius

A

-273/0/100

49
Q

What are the Solid/liquid/Gas points for?

Fahrenheit

A

-460/32/212

50
Q

Is there a difference between an element and a molocule

A

element - An element is a pure substance that is composed of only one kind of atom. The atoms may be combined to form molecules. As long as all of the atoms are the same, the substance is an element. The sample may be a solid, a liquid, a gas, or a mixture of states.

51
Q

leading zeros

A

come before the first non-zero digit

52
Q

trailing zeros

A

come after the last non-zero digit

53
Q

embedded zeros

A

come between non-zero digits

Chemisty 111 (2 decks)

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