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Berenguer Chemistry 2 measurements Flashcards | StudBud
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Berenguer Chemistry 2 measurements
Berenguer Chemistry 2 measurements
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Scientific method, sig figs, and scientific notation
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Questions
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Answers
1
Which of these measures mass?
L
cm3
mm
g
2
If measurements agree closely, but are far from the accepted value they are
accurate and precise
accurate but not precise
neither accurate nor precise
precise but not accurate
3
1 mL is equal to
1 gram
cm
1 cubic centimeter
1000 L
4
450 g =
4500 mg
0.45 kg
0.45 mg
450000 kg
5
The symbol mL stands for
megaliter
many liters
milliliter
microliter
6
write 250000 in scientific notation
2.5 x 105
2.50000 x 105
2.5 x 10-5
250 X 103
7
What is the density of a material if its mass is 6 g and its volume is 2 cm
3
12 g
3 g/cm3
12 g/cm3
3 cm3
8
Which of these represents the largest mass
g
kg
cg
mg
9
5.45 X 2.3= (use the correct number of sig figs)
12.535
12.54
12.5
12
10
Which of these is a unit of volume?
mL
cm
mg
mm
11
Which of these is not part of the scientific method?
discarding data that does not fit your hypothesis
developing models
creating a hypothesis
Recording and analyzing data from experiments
12
The formula for density is
D=mv
D=v/m
D=m/v
D=v + m
13
Which of these is the SI unit of time?
hr
sec
min
s
14
Which equation describes an inverse proportionality between x and y
k=x/y
xy=k
x=k/y
y=k/x
15
Which of these numbers has 3 sig. figs.
480
480.00
0.048
0.000480
16
Which is qualitative?
Mr. B is the best teacher
Mr. B has too much gray hair
Mr. B is old
Mr. B weighs about 210 lbs
17
We use standards of measurements because...
Are the same in every laboratory
they can change constantly
they vary by location
they can relate to everyday objects
18
The graph of 2 directly proportional variables is a
hyperbola
parabola
straight line
ellipse
19
Write 0.00350 in scientific notation
3.50 x 103
3.5 x 10-3
3.5 x 103
3.50 x 10-3
20
Mass is
measured in pounds
determined by comparing an object to a known mass
measured on a spring scale
affected by gravity
21
Which of these is quantitative?
There are 30 kids in the class
Science is the best subject
The kids in the class are all ugly
The class is too crowded
22
How many sig. figs. are in 32000
3
5
4
2
23
2.36 + 14 + 1.8= (use the correct number of sig figs)
18.16
18.1
18.0
18
