Q: A student is preparing a solution by dissolving 5.00 g of NaCl in enough water to make 250 mL of solution. What is the molarity of the solution? (Molar mass of NaCl = 58.44 g/mol)

$$M = \frac{5.00\ \text{g}}{58.44\ \text{g/mol}} \div 0.250\ \text{L} = 0.342\ \text{M}$$

Q: A patient receives an intravenous solution containing glucose (C$$_6H$_{12}O$_6). If $$the solution contains 10 g of glucose in 500 mL, what is the concentration in $$\text{g/L}$$?

$$\frac{10\ \text{g}}{0.5\ \text{L}} = 20\ \text{g/L}$$

Q: A solution is prepared by mixing 100 mL of 0.5 M NaOH with 400 mL of water. What is the final concentration of NaOH?

$$C_1V_1 = C_2V_2$$; $$C_2$$ = \frac{0.5\ \text{M} \times 100\ \text{mL}}{500\ \text{mL}} = 0.10\ \text{M}$$

Question 1

Which of the following best describes the primary focus of General, Organic, and Biological (GOB) Chemistry as taught in CHM11900?

Accepted Answer

It integrates general chemistry principles with organic and biological chemistry, emphasizing real-world applications in health and life sciences.

Question 2

A student is preparing a solution by dissolving 5.00 g of NaCl in enough water to make 250 mL of solution. What is the molarity of the solution? (Molar mass of NaCl = 58.44 g/mol)

Accepted Answer

$$M = \frac{5.00\ 	ext{g}}{58.44\ 	ext{g/mol}} \div 0.250\ 	ext{L} = 0.342\ 	ext{M}$$

Question 3

Which statement best explains why water is considered a polar molecule?

Accepted Answer

The oxygen atom is more electronegative than hydrogen, resulting in an uneven distribution of electron density.

Question 4

A patient receives an intravenous solution containing glucose (C$$_6H$_{12}O$_6). If $$the solution contains 10 g of glucose in 500 mL, what is the concentration in $$	ext{g/L}$$?

Accepted Answer

$$\frac{10\ 	ext{g}}{0.5\ 	ext{L}} = 20\ 	ext{g/L}$$

Question 5

Which of the following is a correct statement about isotopes?

Accepted Answer

Isotopes have the same number of protons but different numbers of neutrons.

Question 6

During a chemical reaction, 2.0 mol of H$$_2$$ reacts with 1.0 mol of O$$_2 to $$produce water. What is the limiting reactant?

Accepted Answer

O$$_2$$

Question 7

Which equation correctly represents the relationship between pressure, volume, and temperature for an ideal gas?

Accepted Answer

$$PV = nRT$$

Question 8

A solution is prepared by mixing 100 mL of 0.5 M NaOH with 400 mL of water. What is the final concentration of NaOH?

Accepted Answer

$$C_1V_1 = C_2V_2$$; $$C_2$$ = \frac{0.5\ 	ext{M} 	imes 100\ 	ext{mL}}{500\ 	ext{mL}} = 0.10\ 	ext{M}$$

Question 9

Which of the following best describes the role of enzymes in biological systems?

Accepted Answer

Enzymes act as biological catalysts, speeding up chemical reactions without being consumed.

Question 10

A buffer solution is made by mixing acetic acid and sodium acetate. What is the primary function of this buffer in a biological system?

Accepted Answer

To maintain a constant pH by neutralizing added acids or bases.

Question 11

Which of the following is a correct statement about ionic compounds?

Accepted Answer

Ionic compounds are formed by the transfer of electrons from one atom to another.

Question 12

A sample of gas occupies 2.0 L at 1.0 atm. If the pressure is increased to 2.0 atm at constant temperature, what is the new volume?

Accepted Answer

$$P_1V_1 = P_2V_2$$; $$V_2$$ = \frac{P_1V_1}{$$P_2$$} = \frac{1.0\ 	ext{atm} 	imes 2.0\ 	ext{L}}{2.0\ 	ext{atm}} = 1.0\ 	ext{L}$$

Question 13

Which of the following is a correct statement about the structure of an atom?

Accepted Answer

Protons and neutrons are found in the nucleus, while electrons occupy orbitals around the nucleus.

Question 14

Which of the following best describes a covalent bond?

Accepted Answer

A covalent bond is formed by the sharing of electrons between atoms.

Question 15

A patient’s blood pH drops from 7.4 to 7.1. What does this indicate about the blood’s acidity?

Accepted Answer

The blood has become more acidic.

Question 16

Which of the following is a correct statement about organic compounds?

Accepted Answer

Organic compounds are primarily composed of carbon and hydrogen atoms.

Question 17

Which of the following is a correct statement about the periodic table?

Accepted Answer

Elements in the same group have similar chemical properties.

Question 18

A chemical reaction releases energy in the form of heat. Which type of reaction is this?

Accepted Answer

Exothermic

Question 19

Which of the following is a correct statement about carbohydrates?

Accepted Answer

Carbohydrates are organic molecules containing carbon, hydrogen, and oxygen.

General Chemistry I (GOB Chemistry) Syllabus and Course Structure – Purdue Northwest CHM11900

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