Question 1

Which of the following is the correct name for the compound with the formula $$\mathrm{$$FeCl_3$$}$$?

Accepted Answer

Iron(III) chloride

Question 2

What is the correct formula for ammonium sulfate?

Accepted Answer

$$\mathrm{(NH_4$)_2SO_4}$$

Question 3

Which of the following statements about polyatomic ions is TRUE?

Accepted Answer

Polyatomic ions are ions composed of more than one atom covalently bonded together, carrying an overall charge.

Question 4

Which of sop the following compounds contains both ionic and covalent bonds?

Accepted Answer

$$\mathrm{$$NaNO_3$$}$$

Question 5

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

Accepted Answer

O=C=O, with each O atom having two lone pairs

Question 6

Which of the following molecules is nonpolar, despite having polar bonds?

Accepted Answer

$$\mathrm{CO_2$}$$

Question 7

Which of the following best describes why hydrogen bonds are significant in biological molecules?

Accepted Answer

They help stabilize the three-dimensional structures of proteins and DNA.

Question 8

Given the skeletal structure of a straight-chain alkane with 5 carbon atoms, how many hydrogen atoms are present in the molecule?

Accepted Answer

12

Question 9

Which of the following molecules can form hydrogen bonds with water?

Accepted Answer

$$\mathrm{CH_3OH} ($$methanol)

Question 10

Which of the in the following is the correct balanced equation for the combustion of methane ($$\mathrm{CH_4$}$$)?

Accepted Answer

$$\mathrm{CH_4$ + 2O_2 \rightarrow CO_2$ + 2H_2O}$$

Question 11

Which of the following statements about electronegativity is correct?

Accepted Answer

Electronegativity is a measure of an atom's ability to attract shared electrons in a bond.

Question 12

Which of the following best describes London Dispersion Forces?

Accepted Answer

They are temporary attractive forces that result from momentary dipoles in all molecules.

Question 13

Which of the following is the correct name for $$\mathrm{N_2O_5}$$?

Accepted Answer

Dinitrogen pentoxide

Question 14

Which of the following molecules is most likely to have a bent molecular geometry?

Accepted Answer

$$\mathrm{H_2O}$$

Question 15

Which of the following statements about hydrocarbons is TRUE?

Accepted Answer

Hydrocarbons are organic molecules composed only of carbon and hydrogen and are generally nonpolar.

Question 16

Which of the following is the correct formula for iron(III) sulfate?

Accepted Answer

$$\mathrm{Fe_2$(SO_4$)_3}$$

Question 17

Which of the following best explains why $$\mathrm{NH_3$} ($$ammonia) is polar?

Accepted Answer

It has polar bonds and a trigonal pyramidal shape, resulting in a net dipole moment.

Question 18

Which of the following is the strongest type of intermolecular force?

Accepted Answer

Hydrogen bonding

Question 19

Which of the following is the correct name for $$\mathrm{K_2CO_3}$$?

Accepted Answer

Potassium carbonate

Question 20

A student mixes solutions of $$\mathrm{$$BaCl_2$$}$$ and $$\mathrm{Na_2SO_4}$$ and observes a white precipitate. Which balanced equation represents this reaction?

Accepted Answer

$$\mathrm{$$BaCl_2$$ + Na_2SO_4 \rightarrow $$BaSO_4$$ + 2NaCl}$$

Chem 101 Exam 2 Study Guide: Ionic and Covalent Compounds, Molecular Polarity, and Chemical Reactions

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