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

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

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

Which process is considered reversible?

Accepted Answer

Melting ice

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 intensive property?

Accepted Answer

Density

Question 6

Which of the following is classified as an extensive property?

Accepted Answer

Mass

Question 7

Convert 128 °F to degrees Celsius using the formula $C = \frac{5}{9}(F - 32)$.

Accepted Answer

$53.3\ ^\circ C$

Question 8

Which of the following is the correct scientific notation for 0.00052?

Accepted Answer

$5.2 	imes 10^{-4}$

Question 9

What is the SI base unit for measuring electric current?

Accepted Answer

Ampere

Question 10

Which metric prefix represents $10^{-6}$?

Accepted Answer

Micro-

Question 11

How many significant figures are in the measurement 0.003640?

Accepted Answer

4

Question 12

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

$0.0051\ \mathrm{kg}$

Question 13

Which of the following is an example of dimensional analysis in a real-world context?

Accepted Answer

Converting the speed limit from miles per hour to meters per second.

Question 14

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 15

A solution is prepared by dissolving 5.00 g of NaCl in 100.0 g of water. Which statement is correct?

Accepted Answer

The solution is a homogeneous mixture.

Question 16

Which of the following is NOT a physical property?

Accepted Answer

Flammability

Question 17

A laboratory measurement yields a value of 8.70 mL for the volume of a liquid. How many significant figures should be reported?

Accepted Answer

3

Question 18

Which of the following is the correct answer, with the right number of significant figures, for $8.7 	imes 10^2 \div 2.63 	imes 10^1$?

Accepted Answer

$3.3 	imes 10^1$

Question 19

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

Accepted Answer

Mass

Question 20

A patient receives an intravenous drug at a rate of 2.75 drops/second with a mass of 42 mg per drop for 7 hours. What is the total mass of drug delivered in grams?

Accepted Answer

$2.9\ \mathrm{g}$

General Chemistry Essentials: Units, Measurement, and Problem Solving

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