Question 1

Which of the following electron configurations represents a neutral atom of sulfur (S)?

Accepted Answer

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

Question 2

How many valence electrons are present in a phosphorus (P) atom?

Accepted Answer

$$5$$

Question 3

Which of the following Lewis structures correctly represents carbon dioxide ($$CO_2$$)?

Accepted Answer

$$O=C=O$$

Question 4

What is the correct formula for the ionic compound formed between magnesium and chlorine?

Accepted Answer

$$MgCl_2$$

Question 5

Which of the following is a polyatomic ion?

Accepted Answer

$$NO_3$$^-$$

Question 6

Given the balanced chemical equation: $$2H_2 + O_2$ \rightarrow 2H_2O$$, how many moles of water are produced from 4 moles of hydrogen gas?

Accepted Answer

$$4$$

Question 7

Which of the following best describes the bond in sodium chloride ($$NaCl$$)?

Accepted Answer

Ionic bond

Question 8

What is the oxidation state of nitrogen in $$NO_3$$^-$$?

Accepted Answer

$$+5$$

Question 9

Which molecule is polar?

Accepted Answer

$$H_2O$$

Question 10

Using VSEPR theory, what is the predicted geometry of $$NH_3$$?

Accepted Answer

Trigonal pyramidal

Question 11

Which of the following intermolecular forces is strongest in water ($$H_2O$$)?

Accepted Answer

Hydrogen bonding

Question 12

What is the molar mass of $$Ca(OH)_2$$?

Accepted Answer

$$74\ g/mol$$

Question 13

Which of the following is the correct formula for ammonium sulfate?

Accepted Answer

$$(NH_4$)_2SO_4$$

Question 14

A sample contains $$3.01 	imes 10$$^{23}$$ molecules of CO_2$. How many moles of CO_2$ are present?

Accepted Answer

$$0.5$$

Question 15

Which of the following reactions is a redox reaction?

Accepted Answer

$$2H_2 + O_2$ \rightarrow 2H_2O$$

Question 16

Which of the following compounds contains a representative metal and a polyatomic ion?

Accepted Answer

$$NaNO_3$$

Question 17

What is the percent composition by mass of oxygen in $$H_2O$$? (Molar mass of $$H_2O = 18\ g/mol$$, $$O = 16\ g/mol)$$

Accepted Answer

$$88.9\%$$

Question 18

Which statement best distinguishes between intermolecular and intramolecular forces?

Accepted Answer

Intermolecular forces occur between molecules, while intramolecular forces occur within a molecule.

Question 19

Which of the following is the correct name for $$Fe_2O_3$$?

Accepted Answer

Iron(III) oxide

Question 20

A compound contains $$40.0\%$$ carbon, $$6.7\%$$ hydrogen, and $$53.3\%$$ oxygen by mass. What is its empirical formula?

Accepted Answer

$$CH_2O$$

General Chemistry Study Guide: Chemical Bonding, The Mole, Chemical Reactions, Thermodynamics, and Intermolecular Forces

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