Q: A student needs to calculate the number of moles in 18.0 g of water ($$H_2O). $$Which formula should they use?

$$\text{moles} = \frac{\text{mass (g)}}{\text{molar mass (g/mol)}}$$

Q: Which of the following is a correct application of dimensional analysis to convert 2.5 L to mL?

$$2.5\ L \times \frac{1000\ mL}{1\ L} = 2500\ mL$$

Question 1

Which of the following best describes the primary focus of CHM 104 at Gadsden State Community College?

Accepted Answer

A survey of general chemistry concepts for non-science majors, emphasizing facts, principles, and theories of chemistry.

Question 2

A student in CHM 104 is required to use a scientific calculator. Which function is specifically recommended for use in this course?

Accepted Answer

EE and LOG functions

Question 3

Which of the following is a prerequisite for enrolling in CHM 104?

Accepted Answer

A minimum of MTH 098 or equivalent placement score

Question 4

A student is performing a titration experiment in the CHM 104 lab. Which of the following best demonstrates proper lab technique and safety?

Accepted Answer

Wearing safety goggles, using a pipette for accurate measurement, and recording data immediately.

Question 5

Which equation would you use to convert 25.0 °C to Kelvin?

Accepted Answer

$$K = ^\circ C + 273.15$$

Question 6

A student needs to calculate the number of moles in 18.0 g of water ($$H_2O). $$Which formula should they use?

Accepted Answer

$$	ext{moles} = \frac{	ext{mass (g)}}{	ext{molar mass (g/mol)}}$$

Question 7

Which of the following best describes the kinetic molecular theory as it applies to gases?

Accepted Answer

Gas particles are in constant, random motion and collisions between them are elastic.

Question 8

A student is asked to write the chemical formula for calcium chloride. Which is correct?

Accepted Answer

$$CaCl_2$$

Question 9

Which of the following is a correct application of dimensional analysis to convert 2.5 L to mL?

Accepted Answer

$$2.5\ L 	imes \frac{1000\ mL}{1\ L} = 2500\ mL$$

Question 10

Which of the following best describes a real-world application of stoichiometry?

Accepted Answer

Calculating the amount of reactants needed to produce a specific amount of product in a pharmaceutical reaction.

Question 11

A student is asked to identify the type of chemical bond in $$NaCl. $$Which is correct?

Accepted Answer

Ionic bond

Question 12

Which equation correctly represents the relationship between pressure, volume, and temperature for a gas (ideal gas law)?

Accepted Answer

$$PV = nRT$$

Question 13

A solution is prepared by dissolving 10.0 g of NaCl in enough water to make 500 mL of solution. What is the molarity of the solution? ($$M_{NaCl} = 58.44\ g/mol)$$

Accepted Answer

$$0.342\ M$$

Question 14

Which of the following best describes an acid according to the Arrhenius definition?

Accepted Answer

A substance that increases the concentration of $$H^+$$ ions in aqueous solution.

Question 15

A student mixes hydrochloric acid ($$HCl) $$with sodium hydroxide ($$NaOH) in a $$titration. What is the balanced chemical equation for this reaction?

Accepted Answer

$$HCl + NaOH \rightarrow NaCl + H_2O$$

Question 16

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

Accepted Answer

Elements in the same group have similar chemical properties.

Question 17

Which formula is used to calculate the pH of a solution given the $$[H^+]$$ concentration?

Accepted Answer

$$pH = -\log [H^+]$$

Question 18

A radioactive isotope decays with a half-life of 3 hours. If you start with 80 g, how much remains after 9 hours?

Accepted Answer

10 g

Question 19

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

Accepted Answer

Burning wood to produce ash and gases.

Question 20

Which of the following best describes the principle of conservation of mass in a chemical reaction?

Accepted Answer

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

CHM 104: Introduction to Chemistry I – Syllabus and Course Overview

Guida di studio - Domande di pratica

Study guide - Flashcard