exam 1 Flashcards
(70 cards)
1
Q
Peta
A
10^15
2
Q
Tera
A
10^12
3
Q
Giga
A
10^9
4
Q
Mega
A
10^6
5
Q
Kilo
A
10^3
6
Q
Deci
A
10^-1
7
Q
Centi
A
10^-2
8
Q
Milli
A
10^-3
9
Q
micro
A
10^-6
10
Q
Nano
A
10^-9
11
Q
Pico
A
10^-12
12
Q
Fento
A
10^-15
13
Q
atto
A
10^-18
14
Q
Zepto
A
10^-21
15
Q
density equation
A
d=m/v
16
Q
the equation to convert F to C
A
C=5/9(F-32)
17
Q
equation to convert C to K
A
K=C+273.15
18
Q
diatomic molecules
A
hydrogen nitrogen iodine chlorine oxygen flouorine bromine
19
Q
1 2 3 4 5 6 7 8 9 10
A
mono di tri tetra penta hexa hepta octa nona deca
20
Q
accuracy
A
how close value agree with actual value
21
Q
atoms
A
smallest representive of an element
22
Q
base units
A
fundamantal units that are defined arbitary and not by combination of any other units. like si units
23
Q
celsius scale
A
a temperature which water freeze at 0 and boil at 100
24
Q
chemical/physical changes
A
chemical change- where one substance convert to other substances
physical change-no change in chemical composition
25
chemical reaction
processes in which one or more substances are converted into other substances also called chemical reaction
26
chemistry
the scientific disicpline that studies the composition, properties, and transformation of matters.
27
chromatography
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.
28
compounds
A substance of two or more elements united chemicaly in definite proportions.
29
conversion factor
a ratio relating the same quantity in two system of units that is used to convert the units of measurements
30
density
the ratio of an object mass to it ratio
31
derived units
In chemistry, a derived unit is an SI unit of measurement comprised of a combination of the seven base units.
32
dimensional analysis
a method of problem solving in which units are carried through all calculaton. all final answers of a calculation has the desired units.
33
distillation
seperating a mixture by boiling and cooling
34
elements
a substance consisting of atoms in the same atomic number.
35
exact numbers
counting numbers
36
extensive properties
a property that depends on the amount of material considered mass or volume
37
filtration
using a medium to remove certain substance to get desired product
38
gas
matter that have no fix volume or shape
39
grams
unit of measurement equal to one cubic centimeter at 4c
40
heterogenous
composed of different things
41
homogenous
same proponent through out
42
hypothesis
propose explaining made at a starting point for investigation
43
inexact numbers
degree of uncertainty measured numbers
44
intensive properties
doesnt change like boiling point, freezing of substance not dependent on size
45
kelvin scale
kelvin scale atoms stop moving at 0 on kelvin scale
46
law of constant composition
law of constant composition states that a given chemical compound always contains its component elements in fixed ratio (by mass)
47
law of definite proportion
law of constant composition states that a given chemical compound always contains its component elements in fixed ratio (by mass)
48
liquid
free flowing, take shape of container it is in.
49
mass
a measure of the amount of material in an object
50
matter
anything that occupies space and has mass. physical material of the universe
51
metric system
system of measurement used in science and most countries
52
mixtures
a combination of of two or more substances in which each retain it own chemical identity
53
molecules
group of atoms bonded together
54
precision
closeness of measured numbers to each other
55
property
a characteristic that gives a sample of matter it unique identity
56
pure substance
matter that has fixed composition and distinct properties
57
qualitive
the determination of the presence or absence of a particular substance in a mixture
58
quantitve
the determination of the amount of a given substance that is present a sample
59
si unit
the preferred metric units for use in science
60
scientific law
a concise verbal statement or mathematical equation that summarizes a wide rage of observation and experiences
61
scientific method
the general process of advancing scientifc knowledge
62
separation
A separation process is a method that converts a mixture or solution of chemical substances into two or more distinct product mixtures
63
significant figures
the digit that indicate the precision with which a measure is made. all digits of a measured quantity are signifcant
64
solid
a matter that has both a definite shape and definite volume
65
solutions
a mixture of substance that has a uniform composition a homogenous
66
states of matters
the three forms that matter can assume solid, liquid, gas
67
temperature
how hot or how cold units of measure is C, F and K
68
theory
a tested model or explanation that satisfactorily accounts for certain set of phenomena
69
uncertainty
a principle stating there is an inherent uncertainity in the precision which we can simultaneously specify
70
volume
amount of space an object occupies
