Q: Which of the following is the correct definition of a mole?

The amount of substance that contains $$6.022 \times 10$$^{23}$$ representative particles.

Question 1

Which of the following best describes the difference between ionic and covalent bonds?

Accepted Answer

Ionic bonds involve the transfer of electrons from a metal to a nonmetal, while covalent bonds involve the sharing of electrons between two nonmetals.

Question 2

Which of the following is the correct Lewis dot structure for a molecule of $$\mathrm{P_2$}$$?

Accepted Answer

Each phosphorus atom is surrounded by 5 dots, with a triple bond between them.

Question 3

Given the reaction: $$\mathrm{Fe + $$CdCl_2$$ \rightarrow $$FeCl_3$$ + Cd}$$, what is the correct classification for this reaction?

Accepted Answer

Single replacement reaction

Question 4

When $$\mathrm{$$CaCl_2$$}$$ and $$\mathrm{NaOH}$$ are mixed in water, which of the following will precipitate?

Accepted Answer

$$\mathrm{Ca(OH)_2}$$

Question 5

What is the net ionic equation for the reaction between $$\mathrm{$$CaCl_2$$}$$ and $$\mathrm{NaOH} in $$aqueous solution?

Accepted Answer

$$\mathrm{Ca$$^{2+}$$ (aq) + 2OH^- (aq) \rightarrow Ca(OH)_2 (s)}$$

Question 6

Balance the following equation: $$\mathrm{ZnS + O_2$ \rightarrow ZnO + SO_2$}. $$What are the correct coefficients?

Accepted Answer

$$\mathrm{2ZnS + 3O_2 \rightarrow 2ZnO + 2SO_2}$$

Question 7

If 10.0 g of $$\mathrm{ZnS}$$ reacts with excess $$\mathrm{O_2$}$$, what is the theoretical yield of $$\mathrm{ZnO} in $$grams? (Molar masses: $$\mathrm{ZnS} = 97.5 g/$$mol, $$\mathrm{ZnO} = 81.4 g/$$mol)

Accepted Answer

8.35 g

Question 8

Which of the following is the correct definition of a mole?

Accepted Answer

The amount of substance that contains $$6.022 	imes 10$$^{23}$$ representative particles.

Question 9

Which of the following is a correct net ionic equation for the neutralization of hydrochloric acid with sodium hydroxide?

Accepted Answer

$$\mathrm{H^+ (aq) + OH^- (aq) \rightarrow H_2O (l)}$$

Question 10

Which of the following best describes a redox reaction?

Accepted Answer

A reaction in which electrons are transferred from one species to another.

Question 11

In the reaction $$\mathrm{Sn + $$HNO_3$$ \rightarrow $$SnO_2$$ + NO_2$ + H_2O}$$, which substance is the oxidizing agent?

Accepted Answer

$$\mathrm{$$HNO_3$$}$$

Question 12

Which of the following is the correct shortcut rule for assigning the oxidation state of oxygen in most compounds?

Accepted Answer

Oxygen is $$-2$$ except in peroxides and with fluorine.

Question 13

Which of the following reactions is a decomposition reaction?

Accepted Answer

$$\mathrm{2H_2O_2 \rightarrow 2H_2O + O_2$}$$

Question 14

Which of the following best describes the role of the reducing agent in a redox reaction?

Accepted Answer

It loses electrons and is oxidized.

Question 15

Given the balanced equation $$\mathrm{2Al + 3Cl_2 \rightarrow 2AlCl_3}$$, how many moles of $$\mathrm{Cl_2$}$$ are required to react completely with 4 moles of $$\mathrm{Al}$$?

Accepted Answer

6 moles

Question 16

Which of the following compounds is most likely to be insoluble in water according to the solubility rules?

Accepted Answer

$$\mathrm{AgCl}$$

Question 17

Which of the following statements about the electromotive force (EMF) series is correct?

Accepted Answer

A metal higher in the EMF series is more likely to act as a reducing agent.

Question 18

Which of the following is the correct molar mass of $$\mathrm{Ca(OH)_2}$$?

Accepted Answer

74.1 g/mol

Question 19

A student dissolves 5.00 g of $$\mathrm{NaCl} in $$water. How many moles of $$\mathrm{NaCl} is $$this? (Molar mass of $$\mathrm{NaCl} = 58.44 g/$$mol)

Accepted Answer

0.0856 mol

Quiz II Review Guidance: Ionic Bonding, Chemical Reactions, Stoichiometry, and Redox

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