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

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