Q: Which equation would you use to convert 25.0 inches to centimeters, given that $$1 \ \text{inch} = 2.54 \ \text{cm}$$?

$$25.0 \ \text{inches} \times \frac{2.54 \ \text{cm}}{1 \ \text{inch}}$$

Question 1

Which of the following best describes the main focus of General Chemistry I as outlined in the syllabus?

Accepted Answer

Principles of atomic and molecular structure, reactivity, stoichiometry, and states of matter.

Question 2

A student measures the mass of a sample as 12.345 g. If the balance used has a precision of 0.01 g, how should the student properly report the measurement using significant figures?

Accepted Answer

Question 3

Which of the following is NOT a fundamental SI unit?

Accepted Answer

Gram (g)

Question 4

Which equation would you use to convert 25.0 inches to centimeters, given that $$1 \ 	ext{inch} = 2.54 \ 	ext{cm}$$?

Accepted Answer

$$25.0 \ 	ext{inches} 	imes \frac{2.54 \ 	ext{cm}}{1 \ 	ext{inch}}$$

Question 5

Which of the following best describes a Brønsted-Lowry acid?

Accepted Answer

A substance that donates a proton (H$$^+) to $$another substance.

Question 6

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

Accepted Answer

Rusting of iron

Question 7

A compound contains only sodium and chlorine. Which type of bonding is most likely present in this compound?

Accepted Answer

Ionic bonding

Question 8

Which of the following best explains why noble gases are generally unreactive?

Accepted Answer

They have completely filled valence electron shells.

Question 9

Which of the following equations correctly represents the ideal gas law?

Accepted Answer

$$PV = nRT$$

Question 10

A reaction has the following balanced equation: $$2H_2 + O_2$ \rightarrow 2H_2O. If $$you start with 4.0 mol of $$H_2$$ and 2.0 mol of $$O_2$$, how many moles of $$H_2O$$ can be produced?

Accepted Answer

4.0 mol

Question 11

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

Accepted Answer

Elements in the same group have similar chemical properties.

Question 12

Which of the following is the correct electron configuration for a neutral atom of oxygen ($$Z=8$$)?

Accepted Answer

$$1s^2$$ $$2s^2$$ $$2p^4$$

Question 13

Which of the following best describes the process of dimensional analysis?

Accepted Answer

Using conversion factors to solve problems involving different units.

Question 14

A sample of gas occupies 10.0 L at 2.00 atm and 300 K. What volume will it occupy at 1.00 atm and 300 K? (Assume ideal gas behavior.)

Accepted Answer

20.0 L

Question 15

Which of the following is a correct statement about acids according to the Arrhenius definition?

Accepted Answer

Acids are substances that increase the concentration of H$$^+$$ ions in aqueous solution.

Question 16

Which of the following is the correct formula for magnesium chloride?

Accepted Answer

$$MgCl_2$$

Question 17

Which of the following best describes the Lewis model of chemical bonding?

Accepted Answer

Atoms share or transfer electrons to achieve noble gas configuration.

Question 18

Which of the following is a real-world application of stoichiometry?

Accepted Answer

Calculating the amount of fertilizer needed for a specific crop yield.

Question 19

Which of the following is the best example of using critical thinking in chemistry?

Accepted Answer

Evaluating experimental data to determine if a hypothesis is supported.

General Chemistry I Syllabus and Course Structure Overview

Guida di studio - Domande di pratica

Study guide - Flashcard