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Chem Chap 1 and 2
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Gravity
Terms in this set (68)
chemistry definition
The science that seeks to understand the behavior of matter by studying what atoms and molecules do.
all matter is composed of....
atoms or molecules
hypothesis
A tentative explanation for an observation or a scientific problem that can be tested by further investigation.
law
A brief statement that summarizes past observations and predicts future ones. Subject to experiments, which can prove them wrong or validate them.
theory
Provides a broader and deeper explanation for observations and laws. They are models of the way nature is, and often predict behavior that extends well beyond the observations and laws on which they are founded.
The weight of an object is determined by the...
pull of gravity on that object.
The mass of an object is a measure of ...
the amount of matter that is contained in an object.
Non-zero digits 1,2,3,4,5,6,7,8,9 are ................ significant
always
356g = ? sig figs
3
interior zeros are ....... significant
always
3055m = ? sig figs
4
trailing zeros after a decimal point are ........ significant
always
3.00 and 40.0 = ? sig figs
3
leading zeros are ........ significant
never
0.009 = ? sig figs
1
trailing zeros with no decimal shown are.....
ambiguous
If a number is ambiguous, switch to .......
scientific notation
exact numbers have an ........ number of sig figs
unlimited
0.001125 = ? sig fig
4
0.1125m = ? sig fig
4
1.12500x10^4m = ? sig fig
6
11205 = ? sig fig
5
When multiplying or dividing measured quantities, what determines the number of significant figures in the result?
the factor with the fewest significant figures
(the result carries the same number of significant figures)
When adding or subtracting measured quantities, what determines the number of significant figures in the result?
the quantity with the fewest decimal places
(the result has the same number of decimal places)
6,974,000,000 in scientific notation
6.974 x 10^9
1,344,000,000 in scientific notation
1.344 x 10^9
11,254,000 in scientific notation
1.1254 x 10^7
4,487,000 in scientific notation
4.487 x 10^6
450 x 10^-9 in decimal notation
0.000000450
13.7 x 10^9 in decimal notation
13,700,000,000
5 x 10^9 in decimal notation
5,000,000,000
5.0 x 10^1 in decimal notation
50
13001 = ?sig figs
5
13111 =?sig figs
5
1.30 x 10^4 = ? sig figs
3
0.00013 = ? sig figs
2
89.3 x 77.0 x 0.08 =
6 x 10^2
(5.01 x 10^5) / (7.8 x 10^2) =
6.4 x 10^2
4.005 x 74 x 0.007 =
2
453 / 2.031 =
223
0.004 + 0.09879 =
0.103
432 + 7.3 - 28.523 =
411
(1.7 x 10^6 / 2.63 x 10^5) + 7.33 =
13.8
(568.99 - 232.1) / 5.3 =
64
(9443 + 45 - 9.9) x 8.1 x 10^6 =
7.7 x 10^10
(3.14 x 2.4367) - 2.34 =
5.31
standard unit of length
meter
symbol for meter
m
standard unit of mass
kilogram
symbol for kilogram
kg
standard unit of time
second
symbol for second
s
standard unit of temperature
kelvin
symbol for kelvin
k
Does mass or weight depend upon gravity?
weight
tera-
T
trillion
1,000,000,000,000
(10^12)
giga-
G
billion
1,000,000,000
(10^9)
mega-
M
million
1,000,000
(10^6)
kilo-
k
thousand
1,000
(10^3)
hecto-
h
hundred
100
(10^2)
deca-
da
ten
10
10^1
deci-
d
tenth
0.1
(10^-1)
centi-
c
hundredth
0.01
(10^-2)
milli-
m
thousandth
0.001
(10^-3)
micro-
u (with a tale - Greek)
millionth
0.000001
(10^-6)
nano-
n
billionth
0.000000001
(10^-9)
pico-
p
trillionth
0.000000000001
(10^-12)
femto-
f
quadrillionth
0.000000000000001
(10^-15)
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