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Week 1 + 2
Week 1 + 2
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Questions
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Answers
1
Precision is...
how close the results are to each other
how well something is done
how close the results are to the expected result
how many significant figures something has
2
A theory can become a law.
True
False
3
How many significant figures does this number have?
8
5
3
7
4
Which of the following is a VOLUME unit?
L
kg
cm^3
in
5
If disproved, a law can become a theory.
True
False
6
What type of substance does the following particle diagram represent?
compound substance
heterogenous mixture
homogenous mixture
element
7
The temperature on Saturday is supposed to be 25
o
F, what is this in Celsius?
-4 degrees Celsius
4 degrees Celsius
3.9 degrees Celsius
-3.9 degrees Celsius
8
Round 768000 to 2 significant figures
77
7.7 x 10^5
7.70 x 10^4
770000
9
What is the value of this measurement?
8.8 mL
8.80 mL
8.7 mL
8.68 mL
10
Oxygen gas (O
2
) is considered a(n):
element
heterogenous mixture
homogenous mixture
compound
11
Which state of matter has strong interactions between its particles?
Liquid
Liquid and Gas
Solid
Gas
12
Which state of matter doesn't have a fixed volume?
Solid
Gas
Gas and Liquid
Liquid
13
The toxicity of a substance is a:
physical property
physical change
chemical property
chemical change
14
A solid turns into a gas (as seen in dry ice). This process is called:
evaporation
condensation
deposition
sublimation
15
Which state of matter doesn't have a fixed shape?
Liquid
Gas
Solid
Gas and Liquid
16
The following is a homogenous mixture
True
False
