Q: A student is asked to convert 25.0 grams of NaCl to moles. Which equation should they use?

$$\text{moles} = \dfrac{\text{grams}}{\text{molar mass}}$$

Q: Which of the following is a correct example of dimensional analysis for converting 100 mL to liters?

$$100 \text{ mL} \times \dfrac{1 \text{ L}}{1000 \text{ mL}} = 0.1 \text{ L}$$

Q: A patient receives a prescription for 500 mg of a medication. If the medication is available as 250 mg tablets, how many tablets should the patient take?

$$\dfrac{500 \text{ mg}}{250 \text{ mg/tablet}} = 2 \text{ tablets}$$

Q: Which of the following is the correct balanced chemical equation for the reaction of hydrochloric acid (HCl) with sodium hydroxide (NaOH)?

$$\text{HCl} + \text{NaOH} \rightarrow \text{NaCl} + \text{H}_2\text{O}$$

Q: Which of the following is the correct formula for calculating the percent yield of a chemical reaction?

$$\text{Percent Yield} = \dfrac{\text{Actual Yield}}{\text{Theoretical Yield}} \times 100$$

Q: A nurse needs to prepare 250 mL of a 0.9% (w/v) saline solution. How many grams of NaCl are required?

$$0.9 \text{ g} / 100 \text{ mL} \times 250 \text{ mL} = 2.25 \text{ g}$$

Question 1

Which of the following best describes the main focus of GOB Chemistry as taught in CHEM 1060?

Accepted Answer

An introduction to general, organic, and biological chemistry concepts relevant to health sciences.

Question 2

A student is asked to convert 25.0 grams of NaCl to moles. Which equation should they use?

Accepted Answer

$$	ext{moles} = \dfrac{	ext{grams}}{	ext{molar mass}}$$

Question 3

Which of the following is a correct example of dimensional analysis for converting 100 mL to liters?

Accepted Answer

$$100 	ext{ mL} 	imes \dfrac{1 	ext{ L}}{1000 	ext{ mL}} = 0.1 	ext{ L}$$

Question 4

A patient receives a prescription for 500 mg of a medication. If the medication is available as 250 mg tablets, how many tablets should the patient take?

Accepted Answer

$$\dfrac{500 	ext{ mg}}{250 	ext{ mg/tablet}} = 2 	ext{ tablets}$$

Question 5

Which statement best describes the relationship between acids and bases according to the Bronsted-Lowry theory?

Accepted Answer

Acids are substances that donate protons, while bases accept protons.

Question 6

A solution has a pH of 3. Which of the following best describes this solution?

Accepted Answer

It is an acidic solution with a high concentration of H$$^+$$ ions.

Question 7

Which of the following is the correct balanced chemical equation for the reaction of hydrochloric acid (HCl) with sodium hydroxide (NaOH)?

Accepted Answer

$$	ext{HCl} + 	ext{NaOH} ightarrow 	ext{NaCl} + 	ext{H}_2	ext{O}$$

Question 8

Which of the following best describes the role of a buffer in a biological system?

Accepted Answer

A buffer maintains a stable pH by neutralizing small amounts of acid or base.

Question 9

A student mixes 0.1 mol of acetic acid (CH$$_3$$COOH) with 0.1 mol of sodium acetate (CH$$_3$$COONa) in water. What type of solution is formed?

Accepted Answer

A buffer solution

Question 10

Which of the following is the correct formula for calculating the percent yield of a chemical reaction?

Accepted Answer

$$	ext{Percent Yield} = \dfrac{	ext{Actual Yield}}{	ext{Theoretical Yield}} 	imes 100$$

Question 11

A nurse needs to prepare 250 mL of a 0.9% (w/v) saline solution. How many grams of NaCl are required?

Accepted Answer

$$0.9 	ext{ g} / 100 	ext{ mL} 	imes 250 	ext{ mL} = 2.25 	ext{ g}$$

Question 12

Which of the following best explains why water is considered a polar molecule?

Accepted Answer

Water has an uneven distribution of electron density due to its bent shape and electronegative oxygen atom.

Question 13

Which of the following is a correct example of a chemical property?

Accepted Answer

Iron reacts with oxygen to form rust.

Question 14

A student is asked to draw the Lewis structure for methane (CH$$_4). $$How many single bonds should be shown?

Accepted Answer

Four single bonds

Question 15

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

Accepted Answer

Enzymes speed up chemical reactions by lowering activation energy.

Question 16

A student is asked to identify the functional group present in ethanol (CH$$_3CH$_2OH). $$Which group is present?

Accepted Answer

Hydroxyl group

Question 17

Which of the following is the correct formula for calculating the molarity of a solution?

Accepted Answer

$$	ext{Molarity} = \dfrac{	ext{moles of solute}}{	ext{liters of solution}}$$

Question 18

A chemical reaction has a theoretical yield of 10.0 g and an actual yield of 8.0 g. What is the percent yield?

Accepted Answer

$$\dfrac{8.0 	ext{ g}}{10.0 	ext{ g}} 	imes 100 = 80\%$$

Question 19

Which of the following best describes the process of osmosis?

Accepted Answer

The movement of solvent molecules from high to low concentration across a semipermeable membrane.

Syllabus and Study Guide: Fundamentals of General, Organic, and Biological Chemistry (GOB Chemistry)

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