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

$$1.5 \times 10^3$\ \mathrm{m^3$}$$

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 in a beaker. 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 is a blue solid at room temperature.

Question 5

Which of the following is an extensive property?

Accepted Answer

Mass

Question 6

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

Accepted Answer

$$0.049\ \mathrm{kg}$$

Question 7

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

Accepted Answer

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

Question 8

A sample of copper with a density of $$8.96\ \mathrm{g/cm^3$}$$ has a diameter of $$0.32\ \mathrm{cm}. If $$the sample has a mass of $$21.7\ \mathrm{g}$$, how long is the wire?

Accepted Answer

$$30.4\ \mathrm{cm}$$

Question 9

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

Accepted Answer

Mass

Question 10

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 11

A scientist places a piece of unknown solid weighing $$0.45\ \mathrm{g} in a $$glass beaker. The water level increases from $$200\ \mathrm{mL} to$$ $$261\ \mathrm{mL}. $$What is the density of the solid in $$\mathrm{g/cm^3$}$$?

Accepted Answer

$$0.0074\ \mathrm{g/cm^3$}$$

Question 12

Which of the following is a chemical change?

Accepted Answer

Cooking an egg

Question 13

Which SI base unit is used to measure electric current?

Accepted Answer

Ampere

Question 14

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

Accepted Answer

$$1.5 	imes 10^3$\ \mathrm{m^3$}$$

Question 15

Which of the following is the correct number of significant figures in the value $$0.003640$$?

Accepted Answer

4

Question 16

Which of the following best describes the difference between a physical and a chemical property?

Accepted Answer

A physical property can be observed without changing the substance's chemical identity, while a chemical property can only be observed during a chemical reaction.

Question 17

Which of the following is a correct conversion factor for converting from grams to kilograms?

Accepted Answer

$$1\ \mathrm{kg} = 1000\ \mathrm{g}$$

Question 18

A nurse administers medication at a rate of $$2.75$$ drops per second with a mass of $$42\ \mathrm{mg}$$ per drop. How many grams of medication are delivered in $$7$$ hours?

Accepted Answer

$$2,898\ \mathrm{g}$$

Question 19

Which of the following is the correct answer, with the right number of significant figures, for $$42.00 \div 11.50 	imes 1.001$$?

Accepted Answer

$$3.66$$

Question 20

Which of the following best represents a reversible change?

Accepted Answer

Condensing water vapor

General Chemistry Study Notes: Matter, Measurement & Problem Solving

Guida di studio - Domande di pratica

Study guide - Flashcard