Question 1

Which of the following best describes a homogeneous mixture?

Accepted Answer

A mixture in which the composition is uniform throughout.

Question 2

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

Accepted Answer

Dissolving sugar in water

Question 3

A sample of copper wire (density = $$8.96\ \mathrm{g/cm^3$}) $$has a diameter of $$0.32\ \mathrm{mm}. If a $$sample of this copper wire has a mass of $$21.7\ \mathrm{g}$$, how long is the wire? (Assume the wire is a perfect cylinder.)

Accepted Answer

$$1200\ \mathrm{cm}$$

Question 4

Which of the following is NOT an example of an intensive property?

Accepted Answer

Mass

Question 5

Convert $$0.00384 to $$scientific notation with the correct number of significant figures.

Accepted Answer

$$3.84 	imes 10$$^{-3}$$

Question 6

Which of the following is a chemical property?

Accepted Answer

Iron rusts when exposed to oxygen gas.

Question 7

A cube of silver has a density of $$10.5\ \mathrm{g/cm^3$}$$ and measures $$0.36\ \mathrm{m} on $$each side. What is its mass in kilograms?

Accepted Answer

$$48600\ \mathrm{g}$$

Question 8

Which of the following is an extensive property?

Accepted Answer

Mass

Question 9

Which of the following is the correct SI unit for measuring the area of a laboratory bench?

Accepted Answer

$$\mathrm{m^2$}$$

Question 10

A scientist measures the volume of a liquid as $$87.0\ \mathrm{mL}$$ using a burette. How many significant figures should be reported?

Accepted Answer

3

Question 11

Which of the following processes is reversible?

Accepted Answer

Dissolving sugar in water

Question 12

If the density of an unknown metal is $$2.14\ \mathrm{g/cm^3$}$$, express its density in $$\mathrm{kg/m^3$}.$$

Accepted Answer

$$2140\ \mathrm{kg/m^3$}$$

Question 13

Which of the following is the correct conversion factor to change $$32$$ inches to centimeters?

Accepted Answer

$$1\ \mathrm{in} = 2.54\ \mathrm{cm}$$

Question 14

Which of the following is NOT a physical property?

Accepted Answer

Potassium metal is extremely reactive when placed in water.

Question 15

A room has a volume of $$1.5 	imes 10^9$\ \mathrm{cm^3$}. $$What is the volume in $$\mathrm{m^3$}$$?

Accepted Answer

$$1.5\ \mathrm{m^3$}$$

Question 16

Which of the following is the correct formula for density?

Accepted Answer

$$\mathrm{Density} = \dfrac{\mathrm{mass}}{\mathrm{volume}}$$

Question 17

Which of the following is a heterogeneous mixture?

Accepted Answer

Trail mix

Question 18

Which of the following is the correct scientific notation for $$0.0005020$$?

Accepted Answer

$$5.020 	imes 10$$^{-4}$$

Question 19

Which of the following is NOT a chemical change?

Accepted Answer

Tearing a piece of paper

Question 20

A pharmaceutical drug contains $$4.0\%$$ active ingredient by mass. What mass in kg of the active ingredient is present in one bottle of $$120\ \mathrm{g}$$ pills?

Accepted Answer

$$0.0048\ \mathrm{kg}$$

Introduction to Matter and Measurement: Study Notes for General Chemistry

Guida di studio - Domande di pratica

Study guide - Flashcard