Q: A student is asked to convert 250 milliliters (mL) to liters (L) using dimensional analysis. Which equation should they use?

$$250 \times \frac{1}{1000} = 0.25 L$$

Q: A nurse needs to prepare a saline solution for a patient. If the prescription requires 0.9% NaCl by mass, which calculation would help determine the mass of NaCl needed for 500 mL of solution?

$$0.9 \text{ g NaCl} \times \frac{500 \text{ mL}}{100 \text{ mL}} = 4.5 \text{ g NaCl}$$

Q: Which formula is used to calculate the molarity ($$M) of a $$solution?

$$M = \frac{\text{moles of solute}}{\text{liters of solution}}$$

Q: Which of the following is a correct example of dimensional analysis for converting 5.0 grams of glucose ($$C_6H_{12}O_6$) to moles? (Molar mass = 180 g/mol)

$$5.0 \text{ g} \times \frac{1 \text{ mol}}{180 \text{ g}} = 0.028$$ mol

Question 1

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

Accepted Answer

An introductory course covering general, organic, and biological chemistry concepts relevant to health sciences.

Question 2

A student is asked to convert 250 milliliters (mL) to liters (L) using dimensional analysis. Which equation should they use?

Accepted Answer

$$250 	imes \frac{1}{1000} = 0.25 L$$

Question 3

Which of the following is a correct application of the scientific method in chemistry?

Accepted Answer

Formulating a hypothesis, conducting experiments, analyzing data, and drawing conclusions.

Question 4

A nurse needs to prepare a saline solution for a patient. If the prescription requires 0.9% NaCl by mass, which calculation would help determine the mass of NaCl needed for 500 mL of solution?

Accepted Answer

$$0.9 	ext{ g NaCl} 	imes \frac{500 	ext{ mL}}{100 	ext{ mL}} = 4.5 	ext{ g NaCl}$$

Question 5

Which statement best explains why understanding chemical reactions is important for health science students?

Accepted Answer

It helps them understand how medications interact with the body at the molecular level.

Question 6

A student is asked to balance the following chemical equation: $$\mathrm{C_2H_6 + O_2$ \rightarrow CO_2$ + H_2O}. $$What is the correct set of coefficients?

Accepted Answer

$$2, 7, 4, 6$$

Question 7

Which of the following best describes the role of acids and bases in biological systems?

Accepted Answer

They help maintain pH balance, which is crucial for enzyme activity and metabolic processes.

Question 8

A patient receives a medication that is a weak acid. What will happen to the pH of their blood if the medication is absorbed in large amounts?

Accepted Answer

The pH will decrease, making the blood more acidic.

Question 9

Which formula is used to calculate the molarity ($$M) of a $$solution?

Accepted Answer

$$M = \frac{	ext{moles of solute}}{	ext{liters of solution}}$$

Question 10

A student mixes 0.5 moles of NaCl in enough water to make 2 liters of solution. What is the molarity of the solution?

Accepted Answer

$$M = \frac{0.5}{2} = 0.25 M$$

Question 11

Which of the following is a correct example of dimensional analysis for converting 5.0 grams of glucose ($$C_6H_{12}O_6$) to moles? (Molar mass = 180 g/mol)

Accepted Answer

$$5.0 	ext{ g} 	imes \frac{1 	ext{ mol}}{180 	ext{ g}} = 0.028$$ mol

Question 12

Which statement best describes the importance of learning about chemical safety and waste disposal in laboratory settings?

Accepted Answer

It ensures the safety of students and protects the environment from hazardous chemicals.

Question 13

A student is asked to identify the functional group in ethanol ($$CH_3CH_2OH). $$Which group is present?

Accepted Answer

Hydroxyl group ($$-OH)$$

Question 14

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

Accepted Answer

Acids are proton donors and bases are proton acceptors.

Question 15

A student is asked to predict the products of the neutralization reaction between hydrochloric acid ($$HCl) $$and sodium hydroxide ($$NaOH). $$What are the products?

Accepted Answer

$$NaCl$$ and $$H_2O$$

Question 16

Which of the following is a correct statement about the role of water as a solvent in biological systems?

Accepted Answer

Water dissolves many ionic and polar substances, facilitating biochemical reactions.

Question 17

A student is asked to calculate the percent composition of carbon in glucose ($$C_6H_{12}O_6$). (Molar mass = 180 g/mol, mass of C = 12 g/mol)

Accepted Answer

$$\frac{6 	imes 12}{180} 	imes 100 = 40\%$$

Question 18

Which of the following best describes the importance of learning about chemical equilibrium in biological systems?

Accepted Answer

It helps explain how reactions in the body can be reversible and maintain homeostasis.

Question 19

A student is asked to use the following equation to solve for the number of moles: $$n = \frac{m}{M}$$, where $$n is $$moles, $$m is $$mass in grams, and $$M is $$molar mass. If $$m = 36 g $$and $$M = 18 g/$$mol, what is $$n$$?

Accepted Answer

$$n = \frac{36}{18} = 2$$ mol

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

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