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

$$m = \frac{\text{moles of solute}}{\text{kg of solvent}}$$

Question 1

Which of the following best describes the role of Peer-Led Team Learning (PLTL) in CHM1046 at Miami Dade College?

Accepted Answer

PLTL provides weekly group problem-solving sessions with a Peer Academic Leader to reinforce chemistry concepts.

Question 2

A student is preparing for the CHM1046 final exam, which covers chapters 13–21 except chapter 18. If the student wants to review chemical thermodynamics, which chapter should they focus on?

Accepted Answer

Chapter 19

Question 3

Which equation is used to calculate the equilibrium constant $$K_c$$ for a reaction at a given temperature?

Accepted Answer

$$K_c = \frac{[products]}{[reactants]}$$

Question 4

During an acid-base titration, which formula is used to determine the pH at the equivalence point for a strong acid-strong base titration?

Accepted Answer

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

Question 5

A reaction has a rate law $$rate = k[A]^2[B]. If $$the concentration of $$A is $$doubled and $$B is $$halved, what happens to the rate?

Accepted Answer

The rate is doubled.

Question 6

Which equation represents the relationship between Gibbs free energy and the equilibrium constant?

Accepted Answer

$$\Delta G^\circ = -RT \ln K$$

Question 7

A student is using a TI-30X IIS calculator during an exam. Which of the following is NOT permitted according to the syllabus?

Accepted Answer

Using a graphing calculator

Question 8

Which formula is used to calculate the molality ($$m) of a $$solution?

Accepted Answer

$$m = \frac{	ext{moles of solute}}{	ext{kg of solvent}}$$

Question 9

Which equation is used to calculate the cell potential ($$E_{cell}) $$for an electrochemical cell?

Accepted Answer

$$E_{cell} = E_{cathode} - E_{anode}$$

Question 10

Which formula is used to calculate the rate constant ($$k) $$for a first-order reaction?

Accepted Answer

$$k = \frac{1}{t} \ln \frac{[A]_0}{[A]}$$

Question 11

Which equation is used to calculate the boiling point elevation ($$\Delta T_b) of a $$solution?

Accepted Answer

$$\Delta T_b = K_b m$$

Question 12

Which equation is used to calculate the entropy change ($$\Delta S) $$for a reversible process?

Accepted Answer

$$\Delta S = \frac{q_{rev}}{T}$$

Question 13

Which equation is used to calculate the solubility product constant ($$K_{sp}) $$for a slightly soluble salt $$AB$$?

Accepted Answer

$$K_{sp} = [A^+][B^-]$$

Question 14

Which equation is used to calculate the half-life ($$t_{1/2}) of a $$first-order reaction?

Accepted Answer

$$t_{1/2} = \frac{0.693}{k}$$

Question 15

Which equation is used to calculate the pH of a weak acid solution?

Accepted Answer

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

Question 16

Which equation is used to calculate the standard cell potential ($$E^\circ_{cell}) $$using the Nernst equation?

Accepted Answer

$$E_{cell} = E^\circ_{cell} - \frac{0.0592}{n} \log Q$$

Question 17

Which equation is used to calculate the rate of a zero-order reaction?

Accepted Answer

$$rate = k$$

Question 18

Which equation is used to calculate the osmotic pressure ($$\Pi) of a $$solution?

Accepted Answer

$$\Pi = MRT$$

Question 19

Which equation is used to calculate the change in enthalpy ($$\Delta H) $$for a reaction?

Accepted Answer

$$\Delta H = \sum \Delta H_{products} - \sum \Delta H_{reactants}$$

CHM 1046 General Chemistry II: Syllabus and Course Structure Overview

Guida di studio - Domande di pratica

Study guide - Flashcard