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

$$2.14 \times 10^3$\ \mathrm{kg/m^3$}$$

Q: Convert $$654\ \mathrm{kg} to$$ $$\mathrm{g}$$ using metric prefixes.

$$6.54 \times 10^5$\ \mathrm{g}$$

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 student mixes sand and salt together. Which classification best describes the resulting material?

Accepted Answer

Heterogeneous mixture

Question 4

Which of the following is NOT a chemical property?

Accepted Answer

It has a yellow-orange color.

Question 5

Which of the following is an example of an extensive property?

Accepted Answer

Mass

Question 6

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

$$4.9\ \mathrm{kg}$$

Question 7

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

Accepted Answer

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

Question 8

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

Accepted Answer

$$2.14 	imes 10^3$\ \mathrm{kg/m^3$}$$

Question 9

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

Accepted Answer

Mass

Question 10

A scientist heats a sample of ice at $$-10^\circ\mathrm{C}$$, melts it, and then boils the resulting water. Which of the following phase changes involves bond breaking?

Accepted Answer

Boiling water

Question 11

Convert $$654\ \mathrm{kg} to$$ $$\mathrm{g}$$ using metric prefixes.

Accepted Answer

$$6.54 	imes 10^5$\ \mathrm{g}$$

Question 12

Which of the following is a correct SI base unit and its physical quantity?

Accepted Answer

Kelvin for temperature

Question 13

A sample of copper wire (density $$8.96\ \mathrm{g/cm^3$}) $$has a diameter of $$0.32\ \mathrm{mm}$$ and a mass of $$21.7\ \mathrm{g}. $$What is the length of the wire in meters? (Assume the wire is a perfect cylinder.)

Accepted Answer

$$3.0\ \mathrm{m}$$

Question 14

Which of the following is a chemical change?

Accepted Answer

Cooking an egg

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 NOT a physical property?

Accepted Answer

Potassium metal is extremely reactive when placed in water.

Question 17

Which of the following measurements contains the correct number of significant figures?

Accepted Answer

$$0.003640$$ has 4 significant figures.

Question 18

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

Accepted Answer

$$4.8\ \mathrm{g}$$

Question 19

Which of the following is the correct temperature conversion formula from Celsius to Kelvin?

Accepted Answer

$$K = ^\circ C + 273.15$$

Question 20

Which of the following is a correct example of dimensional analysis?

Accepted Answer

Converting $$32$$ inches to centimeters using $$2.54 cm/$$inch as a conversion factor.

Introduction to Matter & Measurement: General Chemistry Study Notes

Guida di studio - Domande di pratica

Study guide - Flashcard