Question 1

Which of the following best describes an extensive property?

Accepted Answer

A property that depends on the amount of substance present.

Question 2

A student separates a mixture of sand and salt by adding water, filtering, and then evaporating the water. Which separation techniques are used in this process?

Accepted Answer

Filtration and evaporation

Question 3

Which of the following is an example of a chemical change?

Accepted Answer

Burning of gasoline in a car engine

Question 4

Which statement about the scientific method is correct?

Accepted Answer

It involves making observations, forming hypotheses, and testing them through experiments.

Question 5

Which of the following is a pure substance?

Accepted Answer

Oxygen gas

Question 6

A sample of gold has a mass of $$19.3\ \mathrm{g}$$ and a volume of $$1.00\ \mathrm{cm}^3. $$What is the density of gold?

Accepted Answer

$$19.3\ \mathrm{g/cm}^3$$

Question 7

Which of the following is NOT a base SI unit?

Accepted Answer

Gram

Question 8

A thermometer reads $$25.0\ ^\circ\mathrm{C}. $$What is this temperature in Kelvin?

Accepted Answer

$$298.2\ \mathrm{K}$$

Question 9

Which of the following best describes accuracy in measurement?

Accepted Answer

How close a measurement is to the true value.

Question 10

Which of the following mixtures can best be separated by chromatography?

Accepted Answer

A mixture of colored dyes in ink

Question 11

Which of the following is an intensive property?

Accepted Answer

Density

Question 12

A student records the mass of a sample as $$12.30\ \mathrm{g}$$ and the volume as $$4.0\ \mathrm{cm}^3. $$What is the density, reported with the correct number of significant figures?

Accepted Answer

$$3.1\ \mathrm{g/cm}^3$$

Question 13

Which of the following is a physical change?

Accepted Answer

Sublimation of dry ice

Question 14

Which of the following statements about significant figures is correct?

Accepted Answer

All nonzero digits are significant.

Question 15

Which of the following best describes a compound?

Accepted Answer

A substance composed of two or more elements chemically combined in fixed proportions.

Question 16

A student measures the length of a rod three times and gets values of $$12.1\ \mathrm{cm}$$, $$12.2\ \mathrm{cm}$$, and $$12.1\ \mathrm{cm}. $$The true length is $$13.0\ \mathrm{cm}. $$Which statement is correct?

Accepted Answer

The measurements are precise but not accurate.

Question 17

Which of the following is the correct formula for density?

Accepted Answer

$$d = \dfrac{m}{V}$$

Question 18

Which of the following is a heterogeneous mixture?

Accepted Answer

Salad with lettuce, tomatoes, and cucumbers

Question 19

Which of the following is the correct conversion for $$100\ ^\circ\mathrm{C} to $$Kelvin?

Accepted Answer

$$373\ \mathrm{K}$$

Question 20

Which of the following best describes distillation?

Accepted Answer

A process that separates mixtures based on differences in boiling points.

Chapter 1: Introduction to Matter and Measurement – Study Notes

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