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WorksheetsINORG CHEM_1
Total questions: 10
Worksheet time: 6mins
A tentative explanation for a set of observations that can be tested by further experimentation is referred to as
Theory
Hypothesis
Law
Principle
Complete the following sentence. A theory is__.
a tentative explanation for a set of observations that can be tested by further experimentation.
a statement describing a relationship between phenomena that is always the same under the same conditions.
a unifying principle that explains a body of facts and relations.
Which of the following is an example of a physical property?
corrosiveness of sulfuric acid
toxicity of cyanide
lead becomes a liquid when heated to 601oC
flammability of gasoline
The element gallium melts at 29.8°C. What temperature is this in °F?
–54.1°F
–7.8°F
+51.3°F
+85.6°F
How many significant figures does the result of the following operation contain?
9.520 x 1.90
2
3
4
5
How many significant figures does the result of the following sum contain?
1.5201 + 2.93
2
3
4
6
A block of aluminum occupies a volume of 15.0 mL and weighs 40.5 g. What is its density?
2.70 g/mL
2.7 g/mL
2.8 g/mL
2 g/mL
An organic liquid has a density of 0.8 g/cm3. What is the mass of a 42.0 mL sample of this liquid?
33.6 g
30 g
33 g
30.0 g
What is the weight of the ethyl alcohol that exactly fills a 200.0 mL container? The density of ethyl alcohol is 0.789 g/mL.
157.8 g
158 g
150 g
159 g
Liquid nitrogen boils at –195.8°C. Express the boiling point of liquid nitrogen in °F.
–76.8°F
–320.4°F
–352.4°F
–384.4°F
