Question 1

Which of the following best describes the main focus of General Chemistry I (CHM 151) at Wayne Community College?

Accepted Answer

Fundamental principles and laws of chemistry, including measurement, atomic and molecular structure, periodicity, chemical reactions, chemical bonding, stoichiometry, thermochemistry, gas laws, and solutions.

Question 2

A student is preparing for a closed-book, online quiz in CHM 151. According to the course policies, which of the following items is the student allowed to have during the assessment?

Accepted Answer

A scientific calculator and the approved periodic table.

Question 3

Which of the following is a required component for successful completion of the laboratory portion of CHM 151?

Accepted Answer

Completion of at-home lab experiment exercises using the Science Interactive Lab Kit.

Question 4

A student in CHM 151 receives a grade of zero on two Competency Questions. According to the course policy, what is the highest final grade the student can receive?

Accepted Answer

F

Question 5

If a student has an overall average of 79.5% in CHM 151, what is the final letter grade according to the grading policy?

Accepted Answer

C

Question 6

Which of the following best demonstrates the application of the scientific method as required by the AS program learning outcomes?

Accepted Answer

Analyzing a chemical reaction by forming a hypothesis, conducting an experiment, collecting data, and drawing a conclusion.

Question 7

A student is working on a stoichiometry problem involving the reaction: $$ \mathrm{2H_2 + O_2$ \rightarrow 2H_2O} . If $$the student starts with 4.0 moles of $$ \mathrm{H_2$} $$ and 2.0 moles of $$ \mathrm{O_2$} $$, what is the limiting reactant?

Accepted Answer

Neither reactant is limiting; they are present in the exact stoichiometric ratio.

Question 8

During a gas law experiment, a student collects 1.00 L of a gas at 1.00 atm and 273 K. Using the ideal gas law $$ PV = nRT $$, how many moles of gas are present? (Use $$ R = 0.0821 \ \mathrm{L \cdot atm \cdot $$mol^{-1}$$ \cdot K$$^{-1}$$} )$$

Accepted Answer

$$ 0.0367 \ \mathrm{mol} $$

Question 9

Which of the following is a real-world example of a chemical reaction covered in CHM 151?

Accepted Answer

The rusting of iron in the presence of oxygen and water.

Question 10

A student is asked to calculate the enthalpy change ($$ \Delta H ) $$for a reaction using the equation $$ \Delta H = \sum \Delta H_{\mathrm{products}} - \sum \Delta H_{\mathrm{reactants}} . $$Which of the following best describes what $$ \Delta H $$ represents?

Accepted Answer

The heat absorbed or released during a chemical reaction at constant pressure.

Question 11

Which of the following is an example of applying appropriate mathematics to solve a real-world chemistry problem, as required by the course and program learning outcomes?

Accepted Answer

Estimating the number of molecules in a sample using Avogadro's number: $$ N = n 	imes N_A $$

Question 12

A student is preparing a solution by dissolving 10.0 g of NaCl in enough water to make 500 mL of solution. What is the molarity ($$ M ) of $$the solution? (Molar mass of NaCl = $$ 58.44 \ \mathrm{g/mol} )$$

Accepted Answer

$$ 0.342 \ \mathrm{M} $$

Question 13

Which of the following best describes the concept of periodicity as covered in CHM 151?

Accepted Answer

The tendency of elements to repeat similar properties at regular intervals when arranged by increasing atomic number.

Question 14

A student is analyzing a chemical bond in $$ \mathrm{H_2O} . $$Which type of bonding is primarily responsible for holding the atoms together in a water molecule?

Accepted Answer

Covalent bonding

Question 15

A student is asked to identify a chemical reaction that is exothermic. Which of the following reactions is most likely to be exothermic?

Accepted Answer

The combustion of methane: $$ \mathrm{CH_4$ + 2O_2 \rightarrow CO_2$ + 2H_2O} $$

Question 16

Which of the following is a correct application of the gas laws to a real-world scenario?

Accepted Answer

Predicting how the pressure in a car tire increases when the temperature rises, using $$ \frac{P_1$}{T_1$} = \frac{P_2$}{T_2$}  ($$Gay-Lussac's Law).

Question 17

A student is required to submit all assignments with their first and last name. What is the consequence if a student submits an assignment without their name?

Accepted Answer

The assignment will be discarded and receive a grade of zero.

Question 18

Which of the following best illustrates the importance of academic integrity in CHM 151?

Accepted Answer

Completing all assignments independently and citing any permitted sources.

Question 19

A student is absent from CHM 151 for 15 consecutive days without submitting any assignments. According to the attendance policy, what is the likely outcome?

Accepted Answer

The student will be dropped from the class.

CHM 151: General Chemistry I Syllabus and Study Guide Overview

Guida di studio - Domande di pratica

Study guide - Flashcard