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chemistry > exam 1 > Flashcards

exam 1 Flashcards

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1
Q

Peta

A

10^15

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2
Q

Tera

A

10^12

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3
Q

Giga

A

10^9

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4
Q

Mega

A

10^6

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5
Q

Kilo

A

10^3

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6
Q

Deci

A

10^-1

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7
Q

Centi

A

10^-2

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8
Q

Milli

A

10^-3

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9
Q

micro

A

10^-6

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10
Q

Nano

A

10^-9

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11
Q

Pico

A

10^-12

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12
Q

Fento

A

10^-15

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13
Q

atto

A

10^-18

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14
Q

Zepto

A

10^-21

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15
Q

density equation

A

d=m/v

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16
Q

the equation to convert F to C

A

C=5/9(F-32)

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17
Q

equation to convert C to K

A

K=C+273.15

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18
Q

diatomic molecules

A 
hydrogen
nitrogen
iodine
chlorine
oxygen 
flouorine
bromine
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19
Q 
1
2
3
4
5
6
7
8
9
10
A 
mono
di
tri
tetra
penta
hexa
hepta
octa
nona
deca
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20
Q

accuracy

A

how close value agree with actual value

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21
Q

atoms

A

smallest representive of an element

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22
Q

base units

A

fundamantal units that are defined arbitary and not by combination of any other units. like si units

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23
Q

celsius scale

A

a temperature which water freeze at 0 and boil at 100

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24
Q

chemical/physical changes

A

chemical change- where one substance convert to other substances

physical change-no change in chemical composition

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25
Q

chemical reaction

A

processes in which one or more substances are converted into other substances also called chemical reaction

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26
Q

chemistry

A

the scientific disicpline that studies the composition, properties, and transformation of matters.

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27
Q

chromatography

A

the separation of a mixture by passing it in solution or suspension or as a vapor (as in gas chromatography) through a medium in which the components move at different rates.

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28
Q

compounds

A

A substance of two or more elements united chemicaly in definite proportions.

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29
Q

conversion factor

A

a ratio relating the same quantity in two system of units that is used to convert the units of measurements

30
Q

density

A

the ratio of an object mass to it ratio

31
Q

derived units

A

In chemistry, a derived unit is an SI unit of measurement comprised of a combination of the seven base units.

32
Q

dimensional analysis

A

a method of problem solving in which units are carried through all calculaton. all final answers of a calculation has the desired units.

33
Q

distillation

A

seperating a mixture by boiling and cooling

34
Q

elements

A

a substance consisting of atoms in the same atomic number.

35
Q

exact numbers

A

counting numbers

36
Q

extensive properties

A

a property that depends on the amount of material considered mass or volume

37
Q

filtration

A

using a medium to remove certain substance to get desired product

38
Q

gas

A

matter that have no fix volume or shape

39
Q

grams

A

unit of measurement equal to one cubic centimeter at 4c

40
Q

heterogenous

A

composed of different things

41
Q

homogenous

A

same proponent through out

42
Q

hypothesis

A

propose explaining made at a starting point for investigation

43
Q

inexact numbers

A

degree of uncertainty measured numbers

44
Q

intensive properties

A

doesnt change like boiling point, freezing of substance not dependent on size

45
Q

kelvin scale

A

kelvin scale atoms stop moving at 0 on kelvin scale

46
Q

law of constant composition

A

law of constant composition states that a given chemical compound always contains its component elements in fixed ratio (by mass)

47
Q

law of definite proportion

A

law of constant composition states that a given chemical compound always contains its component elements in fixed ratio (by mass)

48
Q

liquid

A

free flowing, take shape of container it is in.

49
Q

mass

A

a measure of the amount of material in an object

50
Q

matter

A

anything that occupies space and has mass. physical material of the universe

51
Q

metric system

A

system of measurement used in science and most countries

52
Q

mixtures

A

a combination of of two or more substances in which each retain it own chemical identity

53
Q

molecules

A

group of atoms bonded together

54
Q

precision

A

closeness of measured numbers to each other

55
Q

property

A

a characteristic that gives a sample of matter it unique identity

56
Q

pure substance

A

matter that has fixed composition and distinct properties

57
Q

qualitive

A

the determination of the presence or absence of a particular substance in a mixture

58
Q

quantitve

A

the determination of the amount of a given substance that is present a sample

59
Q

si unit

A

the preferred metric units for use in science

60
Q

scientific law

A

a concise verbal statement or mathematical equation that summarizes a wide rage of observation and experiences

61
Q

scientific method

A

the general process of advancing scientifc knowledge

62
Q

separation

A

A separation process is a method that converts a mixture or solution of chemical substances into two or more distinct product mixtures

63
Q

significant figures

A

the digit that indicate the precision with which a measure is made. all digits of a measured quantity are signifcant

64
Q

solid

A

a matter that has both a definite shape and definite volume

65
Q

solutions

A

a mixture of substance that has a uniform composition a homogenous

66
Q

states of matters

A

the three forms that matter can assume solid, liquid, gas

67
Q

temperature

A

how hot or how cold units of measure is C, F and K

68
Q

theory

A

a tested model or explanation that satisfactorily accounts for certain set of phenomena

69
Q

uncertainty

A

a principle stating there is an inherent uncertainity in the precision which we can simultaneously specify

70
Q

volume

A

amount of space an object occupies

chemistry (4 decks)

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