Q: Which of the following is the correct balanced equation for the combustion of glucose ($$C_6H_{12}O_6$) in oxygen?

$$C_6H_{12}O_6$ + 6O_2 \\rightarrow 6CO_2 + 6H_2O$$

Q: A sample of gas occupies 2.0 L at 1.0 atm pressure. If the pressure is increased to 2.0 atm at constant temperature, what will be the new volume according to Boyle’s Law?

$$V_2$$ = \\frac{$$P_1$$ $$V_1$$}{$$P_2$$} = \\frac{1.0 \\times 2.0}{2.0} = 1.0 \\text{ L}$$

Q: Which of the following is the correct formula for calculating the percent composition by mass of an element in a compound?

$$\\text{Percent composition} = \\frac{\\text{mass of element}}{\\text{total mass of compound}} \\times 100$$

Question 1

Which of the following best describes the primary focus of GOB Chemistry as outlined in the course syllabus?

Accepted Answer

The integration of general, organic, and biological chemistry concepts relevant to health sciences.

Question 2

A student is asked to calculate the number of moles in 18 grams of water ($$H_2O). $$Which equation should they use?

Accepted Answer

$$n = \frac{m}{M}$$

Question 3

Which laboratory safety rule is most critical when handling acids and bases, as emphasized in the course?

Accepted Answer

Always add acid to water to prevent exothermic reactions from causing burns.

Question 4

A patient’s blood pH is measured at 7.1. Based on your knowledge of acids and bases, how would you classify this condition?

Accepted Answer

Acidosis

Question 5

Which of the following is the correct balanced equation for the combustion of glucose ($$C_6H_{12}O_6$) in oxygen?

Accepted Answer

$$C_6H_{12}O_6$ + 6O_2 \rightarrow 6CO_2 + 6H_2O$$

Question 6

Which of the following best explains why ionic compounds conduct electricity when dissolved in water?

Accepted Answer

The ions dissociate and move freely, allowing charge to flow.

Question 7

A solution contains 0.5 moles of $$NaCl$$ dissolved in 1.0 L of water. What is the molarity ($$M) of $$the solution?

Accepted Answer

$$M = \frac{0.5}{1.0} = 0.5$$

Question 8

Which of the following statements about the periodic table is correct?

Accepted Answer

Elements in the same group have the same number of valence electrons.

Question 9

A sample of gas occupies 2.0 L at 1.0 atm pressure. If the pressure is increased to 2.0 atm at constant temperature, what will be the new volume according to Boyle’s Law?

Accepted Answer

$$V_2$$ = \frac{$$P_1$$ $$V_1$$}{$$P_2$$} = \frac{1.0 \times 2.0}{2.0} = 1.0 \text{ L}$$

Question 10

Which of the following is a correct application of the law of conservation of mass in a chemical reaction?

Accepted Answer

The total mass of reactants equals the total mass of products.

Question 11

Which of the following best describes a buffer solution?

Accepted Answer

A solution that resists changes in pH when small amounts of acid or base are added.

Question 12

A student mixes 50 mL of 1.0 M $$HCl$$ with 50 mL of 1.0 M $$NaOH. $$What is the resulting pH of the solution?

Accepted Answer

pH = 7

Question 13

Which of the following is a characteristic of covalent compounds?

Accepted Answer

They share electrons between atoms.

Question 14

Which of the following is the correct formula for calculating the percent composition by mass of an element in a compound?

Accepted Answer

$$\text{Percent composition} = \frac{\text{mass of element}}{\text{total mass of compound}} \times 100$$

Question 15

A patient receives an intravenous solution that is isotonic to blood plasma. What does this mean?

Accepted Answer

The solution has the same osmotic pressure as blood plasma.

Question 16

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

Accepted Answer

They act as catalysts to speed up chemical reactions.

Question 17

Which of the following is a correct statement about the atomic number of an element?

Accepted Answer

It is equal to the number of protons in the nucleus.

Question 18

A student needs to prepare 250 mL of a 0.2 M $$NaCl$$ solution. How many moles of $$NaCl$$ are required?

Accepted Answer

$$n = M \times V = 0.2 \times 0.250 = 0.05$$

Question 19

Which of the following is a real-world application of the concept of limiting reactants?

Accepted Answer

Determining the maximum amount of product that can be formed in a pharmaceutical synthesis.

CHEM 101-08 Syllabus: Foundations of GOB Chemistry

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