Question 1

Which of the following correctly names the compound with the formula $$\mathrm{N_2O_3}$$?

Accepted Answer

Dinitrogen trioxide

Question 2

What is the correct formula for sulfur hexafluoride?

Accepted Answer

$$\mathrm{SF_6$}$$

Question 3

Which of the following compounds contains a triple bond in its Lewis structure?

Accepted Answer

$$\mathrm{N_2$}$$

Question 4

How many total valence electrons are present in a molecule of $$\mathrm{$$PCl_3$$}$$?

Accepted Answer

26

Question 5

Which of the following best describes why double and triple bonds form in some molecules?

Accepted Answer

There are not enough valence electrons to complete the octets with single bonds alone.

Question 6

Which of the following is a correct Lewis structure for $$\mathrm{CO_2$}$$?

Accepted Answer

$$\mathrm{O=C=O}$$ with each O atom having two lone pairs

Question 7

Which of the following compounds is used as a propellant in aerosols and also as dry ice?

Accepted Answer

Carbon dioxide ($$\mathrm{CO_2$})$$

Question 8

What is the correct name for the compound $$\mathrm{$$PCl_5$$}$$?

Accepted Answer

Phosphorus pentachloride

Question 9

Which of the following statements is TRUE regarding molecular compounds?

Accepted Answer

They are formed by the sharing of electrons between nonmetals.

Question 10

A molecule of $$\mathrm{CH_4$} ($$methane) has how many bonding pairs and how many lone pairs on the central atom?

Accepted Answer

4 bonding pairs, 0 lone pairs

Question 11

Which of the following is the correct Lewis structure for ammonia ($$\mathrm{NH_3$}$$)?

Accepted Answer

N atom with three single bonds to H atoms and one lone pair on N

Question 12

Which of the following compounds is correctly classified as molecular?

Accepted Answer

$$\mathrm{N_2O}$$

Question 13

What is the correct formula for dinitrogen pentoxide?

Accepted Answer

$$\mathrm{N_2O_5}$$

Question 14

Which of the following best explains why hydrogen does not follow the octet rule in Lewis structures?

Accepted Answer

Hydrogen can only accommodate 2 electrons in its valence shell.

Question 15

Which of the following is the correct name for $$\mathrm{NO}$$?

Accepted Answer

Nitrogen oxide

Question 16

A student draws the Lewis structure for $$\mathrm{$$SiF_4$$}$$ and places Si in the center with four single bonds to F atoms. How many lone pairs are present on each F atom?

Accepted Answer

3

Question 17

Which of the following compounds is used as an inhalation anesthetic, also known as 'laughing gas'?

Accepted Answer

Dinitrogen oxide ($$\mathrm{N_2O})$$

Question 18

Which of the following is the correct formula for phosphorus trichloride?

Accepted Answer

$$\mathrm{$$PCl_3$$}$$

Question 19

Which of the following best describes a covalent bond?

Accepted Answer

A bond formed by the sharing of electrons between two nonmetals

Question 20

Which of the following is the correct name for $$\mathrm{SO_3$}$$?

Accepted Answer

Sulfur trioxide

Chemical Bonding: Molecular and Lewis Structures (Chapter 6, Sections 6.5–6.6)

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