$$\text{Empirical formula} = \frac{\text{percent composition}}{\text{atomic mass}}$$

$$\text{AgCl}$$ will precipitate out of solution.

Question 1

Which of the following best differentiates between an element and a compound?

Accepted Answer

An element consists of only one type of atom, while a compound contains two or more types of atoms chemically bonded.

Question 2

Which of the following is the correct electron configuration for a neutral Fe atom?

Accepted Answer

$$1s^2$$\ $$2s^2$$\ $$2p^6$$\ $$3s^2$$\ $$3p^6$$\ $$3d^6$$\ $$4s^2$$

Question 3

A sample of carbon contains 98.93% $$^{12}C$$ and 1.07% $$^{13}C. $$What is the average atomic mass of carbon?

Accepted Answer

$$12.01\ 	ext{amu}$$

Question 4

Which of the following best describes the trend in atomic radius across a period in the periodic table?

Accepted Answer

Atomic radius decreases from left to right due to increasing nuclear charge.

Question 5

Which of the following is the correct formula for calculating the empirical formula from percent composition data?

Accepted Answer

$$	ext{Empirical formula} = \frac{	ext{percent composition}}{	ext{atomic mass}}$$

Question 6

A solution contains $$	ext{Ag}^+$$ and $$	ext{Cl}^-$$ ions. What will happen when $$	ext{NaCl} is $$added to the solution?

Accepted Answer

$$	ext{AgCl}$$ will precipitate out of solution.

Question 7

Calculate the number of moles in 5.55 grams of $$	ext{NaCl}$$ ($$	ext{Na} = 23.0$$, $$	ext{Cl} = 35.5).$$

Accepted Answer

$$0.095\ 	ext{mol}$$

Question 8

Which of the following statements about gases is true according to the kinetic molecular theory?

Accepted Answer

Lighter gas particles move faster than heavier ones at the same temperature.

Question 9

What is the molar volume of an ideal gas at STP?

Accepted Answer

$$22.4\ 	ext{L}$$

Question 10

Which of the following best describes the dual nature of light?

Accepted Answer

Light exhibits both wave-like and particle-like properties.

Question 11

Which equation is used to calculate the energy of a photon?

Accepted Answer

$$E = h 
u$$

Question 12

Which of the following best explains why $$	ext{Mg}$$ and $$	ext{Al}$$ have different ionization energies?

Accepted Answer

Al has a higher nuclear charge but its outer electron is in a higher energy subshell than Mg.

Question 13

Which type of bonding is present in $$	ext{NaCl}$$?

Accepted Answer

Ionic bonding

Question 14

Which intermolecular force is responsible for the high boiling point of water?

Accepted Answer

Hydrogen bonding

Question 15

Which of the following is a correct statement about solubility rules?

Accepted Answer

All sodium salts are soluble in water.

Question 16

Which of the following best describes the Maxwell-Boltzmann distribution for a gas at higher temperature?

Accepted Answer

The distribution shifts to higher speeds and becomes broader.

Question 17

Which laboratory technique is best for determining the concentration of an unknown acid solution?

Accepted Answer

Titration

Question 18

Which of the following is true about the relationship between boiling point and intermolecular forces?

Accepted Answer

Substances with stronger intermolecular forces have higher boiling points.

Question 19

Which of the following is the correct order of electromagnetic radiation from lowest to highest energy?

Accepted Answer

Radio \u003c Infrared \u003c Visible \u003c Ultraviolet \u003c X-ray

Question 20

Which of the following best describes the process of precipitation in a chemical reaction?

Accepted Answer

A solid forms when two solutions are mixed and an insoluble product is produced.

General Chemistry Comprehensive Study Guide

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