Question 1

A sample of gold has a mass of 96.5 g and a volume of 5.00 cm$$^3. $$What is the density of gold in g/cm$$^3$$?

Accepted Answer

$$19.3\ \mathrm{g/cm}^3$$

Question 2

Which of the following best describes the difference between a homogeneous mixture and a compound?

Accepted Answer

A homogeneous mixture can be separated by physical means, while a compound can only be separated by chemical means.

Question 3

A 50.0 g sample of water is heated from $$20.0\ ^\circ\mathrm{C} to$$ $$80.0\ ^\circ\mathrm{C}. If $$the specific heat of water is $$4.18\ \mathrm{J/g\ ^\circ C}$$, how much heat is absorbed?

Accepted Answer

$$12,540\ \mathrm{J}$$

Question 4

Which statement about Rutherford’s gold foil experiment is correct?

Accepted Answer

It demonstrated that atoms have a small, dense, positively charged nucleus.

Question 5

Which of the following is the correct electron arrangement for a neutral atom of sodium ($$Z=11$$)?

Accepted Answer

$$2, 8, 1$$

Question 6

A radioactive isotope has a half-life of 4 hours. If you start with 80 mg, how much remains after 12 hours?

Accepted Answer

$$10\ \mathrm{mg}$$

Question 7

Which of the following compounds is named correctly?

Accepted Answer

Na$$_2SO$_4$$: Sodium sulfate

Question 8

Which of the following is a balanced chemical equation for the combustion of methane ($$\mathrm{CH}_4$$)?

Accepted Answer

$$\mathrm{CH}_4 + 2\ \mathrm{O}_2 \rightarrow \mathrm{CO}_2 + 2\ \mathrm{H}_2\mathrm{O}$$

Question 9

How many moles are in 88.0 g of CO$$_2$$? (Molar mass of CO$$_2 = 44.0 g/$$mol)

Accepted Answer

$$2.00\ \mathrm{mol}$$

Question 10

A gas occupies 4.00 L at 1.00 atm. If the pressure is increased to 2.00 atm at constant temperature, what is the new volume?

Accepted Answer

$$2.00\ \mathrm{L}$$

Question 11

Which solution is hypertonic relative to a red blood cell?

Accepted Answer

A solution with a higher solute concentration than the cell

Question 12

Which of the following is a strong electrolyte?

Accepted Answer

NaCl (aq)

Question 13

What is the pH of a solution with $$[\mathrm{H}^+] = 1 	imes 10$$^{-4}$$\ \mathrm{M}$$?

Accepted Answer

$$4$$

Question 14

Which of the following is an isomer of C$$_4H$_{10}$$?

Accepted Answer

2-methylpropane

Question 15

Which of the following is a disaccharide?

Accepted Answer

Sucrose

Question 16

Which of the following is a function of lipids in the human body?

Accepted Answer

Energy storage

Question 17

Which level of protein structure is primarily stabilized by hydrogen bonds between backbone atoms?

Accepted Answer

Secondary structure

Question 18

Which of the following best describes denaturation of a protein?

Accepted Answer

Loss of secondary, tertiary, or quaternary structure without breaking peptide bonds

Question 19

A solution is prepared by dissolving 10.0 g of NaCl in enough water to make 250.0 mL of solution. What is the molarity of the solution? (Molar mass of NaCl = 58.44 g/mol)

Accepted Answer

$$0.684\ \mathrm{M}$$

Comprehensive Review Notes for General, Organic, and Biological Chemistry Final Exam

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