Q: A student mixes 0.50 mol of NaCl with 1.00 L of water. What is the molarity of the resulting solution?

$$M = \frac{0.50\ \text{mol}}{1.00\ \text{L}} = 0.50\ \text{M}$$

Q: A patient is given a saline solution containing 0.9% NaCl by mass. If the patient receives 500 mL of solution, approximately how many grams of NaCl did they receive? (Assume the density of the solution is $$1.0\ \text{g/mL})$$

$$0.9\% \times 500\ \text{g} = 4.5\ \text{g}$$

Q: A solution is prepared by dissolving 10.0 g of glucose ($$C_6H_{12}O_6$) in enough water to make 250 mL of solution. What is the molarity of the solution? (Molar mass of glucose = 180$$\ \text{g/mol}$$)

$$M = \frac{10.0\ \text{g}}{180\ \text{g/mol}} \div 0.250\ \text{L} = 0.222\ \text{M}$$

Question 1

Which of the following best describes the difference between organic and inorganic chemistry as covered in this course?

Accepted Answer

Organic chemistry is concerned with carbon-containing compounds and their reactions, whereas inorganic chemistry deals with compounds that do not contain carbon as the principal element.

Question 2

A student mixes 0.50 mol of NaCl with 1.00 L of water. What is the molarity of the resulting solution?

Accepted Answer

$$M = \frac{0.50\ 	ext{mol}}{1.00\ 	ext{L}} = 0.50\ 	ext{M}$$

Question 3

Which statement about the periodic table is correct?

Accepted Answer

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

Question 4

A patient is given a saline solution containing 0.9% NaCl by mass. If the patient receives 500 mL of solution, approximately how many grams of NaCl did they receive? (Assume the density of the solution is $$1.0\ 	ext{g/mL})$$

Accepted Answer

$$0.9\% 	imes 500\ 	ext{g} = 4.5\ 	ext{g}$$

Question 5

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

Accepted Answer

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

Question 6

Which laboratory safety rule is most important when working with acids and bases?

Accepted Answer

Always add acid to water to prevent exothermic reactions and splashing.

Question 7

Which of the following is a correct statement about intermolecular forces?

Accepted Answer

London dispersion forces are present in all molecules, regardless of polarity.

Question 8

A solution is prepared by dissolving 10.0 g of glucose ($$C_6H_{12}O_6$) in enough water to make 250 mL of solution. What is the molarity of the solution? (Molar mass of glucose = 180$$\ 	ext{g/mol}$$)

Accepted Answer

$$M = \frac{10.0\ 	ext{g}}{180\ 	ext{g/mol}} \div 0.250\ 	ext{L} = 0.222\ 	ext{M}$$

Question 9

Which of the following best explains why water is a good solvent for ionic compounds?

Accepted Answer

Water is polar and can stabilize ions through ion-dipole interactions.

Question 10

A buffer solution is made by mixing acetic acid ($$CH_3COOH) $$and sodium acetate ($$CH_3COONa). $$What is the main function of this buffer in a biological system?

Accepted Answer

To maintain a relatively constant pH when small amounts of acid or base are added.

Question 11

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

Accepted Answer

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

Question 12

Which statement best describes the role of enzymes in biochemical reactions?

Accepted Answer

Enzymes act as catalysts, lowering the activation energy and increasing reaction rates.

Question 13

A student needs to prepare 250 mL of 0.10 M NaOH solution. How many grams of NaOH (molar mass = $$40.0\ 	ext{g/mol}) $$are required?

Accepted Answer

$$0.10\ 	ext{mol/L} 	imes 0.250\ 	ext{L} 	imes 40.0\ 	ext{g/mol} = 1.0\ 	ext{g}$$

Question 14

Which of the following is a correct statement about the structure of proteins?

Accepted Answer

Proteins are composed of amino acids linked by peptide bonds.

Question 15

Which of the following is the correct net ionic equation for the reaction between aqueous solutions of NaCl and AgNO$$_3$$?

Accepted Answer

$$Ag^+ (aq) + Cl^- (aq) \rightarrow AgCl (s)$$

Question 16

A sample of gas occupies 2.0 L at 1.0 atm. If the pressure is increased to 4.0 atm at constant temperature, what will be the new volume?

Accepted Answer

$$P_1V_1 = P_2V_2 \Rightarrow V_2$ = \frac{P_1V_1}{P_2$} = \frac{1.0 	imes 2.0}{4.0} = 0.50\ 	ext{L}$$

Question 17

Which of the following is a correct statement about carbohydrates?

Accepted Answer

Carbohydrates are composed of monosaccharides linked by glycosidic bonds.

Question 18

Which of the following best describes the function of nucleic acids in living organisms?

Accepted Answer

Nucleic acids store and transmit genetic information.

Question 19

A student titrates 25.0 mL of HCl with 0.100 M NaOH. If it takes 30.0 mL of NaOH to reach the endpoint, what is the concentration of the HCl solution?

Accepted Answer

$$M_1V_1 = M_2V_2 \Rightarrow M_1$ = \frac{M_2V_2}{V_1$} = \frac{0.100 	imes 30.0}{25.0} = 0.120\ 	ext{M}$$

General Chemistry I (CHEM 201) Syllabus and Study Guide

Study Guide - Practice Questions

Study Guide - Flashcards