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Chem Unit 1 (ch 1 & 3) Flashcards | StudBud
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Chem Unit 1 (ch 1 & 3)
Chem Unit 1 (ch 1 & 3)
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Introduction to chemistry, #measurements, #scientific notation, #sig figs, #chemistry
Flashcards
22 cards
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Practice quiz
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Questions
22
Answers
1
What is the sum of 15.8 + 3.894 expressed in the correct number of significant digits?
19.7
19.69
19.694
19.6
2
What is the results of dividing 8.75 x 10
7
by 3.5 x 10
-7
?
2.5 x 102
2.5 x 1014
2.5 x 100
2.5 x 10-14
3
As the density of a substance increases, the volume of a given mass of that substance ____.
is not affected
decreases
increases
fluctuates
4
What is the volume of 70.6 g of gold if the density of gold is 19.3 g/mL?
389 mL
0.27 mL
none of these answers
3.66 mL
5
Which field of science studies the composition and structure of matter?
Geology
Biology
Physics
Chemistry
6
The sun's diameter is 1,392,000 km. Express this number in scientific notation.
1.392 x 106 km
1.392 x 10-6 km
13.92 x 107 km
13.92 x 105 km
7
What is the density of a soccer ball that weighs 510 g and has a volume of 5510 mL?
5620 g/mL
0.09 g/mL
0.9 g/mL
10.8 mL/g
8
Describe these results.
Precise but not accurate
Both accurate and precise
Accurate but not precise
Neither accurate or precise
9
A theory is a _______?
summary of the results of many observations
procedure used to test a proposed explanation
proposed explanation for an observation
well-tested explanation for a broad set of observations
10
The chief advantage of the metric system over other systems of measurement is that is _______.
has more units
is derived from nature itself
is in multiples of 10
is in multiples of 15
11
What is the SI unit of mass?
liter
kilogram
candela
joule
12
Which is the SI scale for temperature?
Fahrenheit temperature scale
Kelvin temperature scale
Celsius temperature scale
Newton temperature scale
13
How many centimeters are in 2 meters?
0.02 cm
20 cm
200 cm
0.2 cm
14
The variable that you change during an experiment is called what type of variable?
dependent
manipulating
control
independent
15
The conversion factor that shows the relationship between Liters and milliliters is:
1 mL / 1000 L
÷ 10
1000 mL / 1 L
x 100
16
How many significant figures are in 0.00540?
5
2
6
3
17
In any measurement, the estimated digit is always the:
first digit on the left
last digit on right
first digit on the right
18
What is 315 K expressed in degrees Celsius?
-42 degrees C
-273 degrees C
42 degrees C
273 degrees C
19
Which temperature scale has no negative temperatures?
Celsius
Kelvin
Fahrenheit
Newtons
20
What is the correct definition of accuracy?
science that studies the composition and structure of matter
known or estimated in a measurement
narrowness of range of measurements
closeness to true value
21
Write 0.704 in scientific notation.
7.04 x 10-1
0.704 x 10-1
704 x 103
7.04 x 101
22
What is the temperature of absolute zero measured in °C
-173°C
-373°C
-273°C
-73°C
