Question 1

Which of the following best describes a chemical property?

Accepted Answer

The flammability of gasoline

Question 2

A student measures the mass of a sample as 4.70 g. How many significant figures are in this measurement?

Accepted Answer

3

Question 3

Which of the following is an example of a heterogeneous mixture?

Accepted Answer

Oil and vinegar salad dressing

Question 4

A sample of aluminum has a mass of 54.0 g and a volume of 20.0 cm$$^3. $$What is its density in g/cm$$^3$$?

Accepted Answer

$$2.70$$

Question 5

Which of the following statements about the scientific method is FALSE?

Accepted Answer

A hypothesis is a summary of a large quantity of information.

Question 6

Convert $$0.0047$$ kilograms to milligrams. (Use $$1\ \mathrm{kg} = 10^3$\ \mathrm{g}$$ and $$1\ \mathrm{g} = 10^3$\ \mathrm{mg})$$

Accepted Answer

$$4.7 	imes 10^6$ mg

Question 7

Which of the following is an extensive property?

Accepted Answer

Mass

Question 8

A beaker contains $$10.0 mL of $$mercury ($$\mathrm{Hg}) $$with a density of $$13.6 g/mL. $$What is the mass of mercury in the beaker?

Accepted Answer

$$136 g$$

Question 9

Which of the following best describes a physical change?

Accepted Answer

Boiling water becomes steam

Question 10

A student adds $$1.26$$ and $$3.831$$ using the correct number of significant figures. What is the result?

Accepted Answer

$$5.09$$

Question 11

Which of the following is the correct scientific notation for $$0.00018$$ with two significant figures?

Accepted Answer

$$1.8 	imes 10$$^{-4}$$

Question 12

A sample of air has a density of $$0.0013 g/mL. $$What is the mass, in grams, of a $$6.0 L $$sample of air? (Note: $$1 L$$ $$= 1000 mL)$$

Accepted Answer

$$7.8 g$$

Question 13

Which of the following is a correct statement about energy?

Accepted Answer

Energy can be converted from one form to another.

Question 14

A patient’s urine sample has a density of $$1.020 g/mL. $$What is the specific gravity of the sample? (Density of water at $$4^\circC is$$ $$1.000 g/mL)$$

Accepted Answer

$$1.02$$

Question 15

Which of the following is an example of a pure substance?

Accepted Answer

Oxygen gas

Question 16

Convert $$75$$ degrees Celsius to degrees Fahrenheit using the formula $$T_F = 1.8 	imes T_C + 32.$$

Accepted Answer

$$167$$ ^\circ$F

Question 17

Which of the following is the best example of a model in chemistry?

Accepted Answer

A ball-and-stick representation of methane

Question 18

A student needs to convert $$5.5$$ inches to millimeters. (Given: $$1$$ inch $$= 2.54 cm$$, $$1 cm$$ $$= 10 mm). $$What is the correct answer?

Accepted Answer

$$139.7 mm$$

Question 19

Which of the following is NOT a step in the scientific method?

Accepted Answer

Ignoring data that does not fit the hypothesis

Chapter 1: Chemistry—Methods and Measurement (Study Notes)

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