Question 1

Which of the following is an example of a chemical process?

Accepted Answer

Rusting of a nail.

Question 2

A certain liquid has a density of $$2.67\ \mathrm{g/cm^3$}. $$What volume in liters would $$1340\ \mathrm{g} of $$this liquid occupy?

Accepted Answer

$$0.502$$

Question 3

How many significant figures does the value $$450.00$$ have?

Accepted Answer

5

Question 4

Convert $$8.65 	imes 10^9$\ \mathrm{m^2$} to$$ $$\mathrm{km^2$}.$$

Accepted Answer

$$8.65 	imes 10^3$

Question 5

Which statement best describes the law of constant proportion?

Accepted Answer

The type of elements and their ratio to one another is constant for a specific compound/molecule.

Question 6

When a metal and a nonmetal react, which element tends to lose electrons and which tends to gain electrons?

Accepted Answer

The metal tends to lose electrons and the nonmetal tends to gain electrons.

Question 7

How many orbitals are present in the second shell ($$n=2) of an $$atom?

Accepted Answer

4

Question 8

Which of the following does NOT have eight valence electrons?

Accepted Answer

$$\mathrm{B$$^{3+}$$}$$

Question 9

A nonpolar bond will form between two _____ atoms of _____ electronegativity.

Accepted Answer

Identical, equal

Question 10

Which of the following bonds is the least polar, given the electronegativities: C (2.5), O (3.5), F (4.0), Na (0.9), S (2.5)?

Accepted Answer

S—O

Question 11

Which compound is insoluble in water?

Accepted Answer

$$\mathrm{Fe(OH)_3}$$

Question 12

In a basic solution, which of the following is true?

Accepted Answer

$$[\mathrm{H_3O^+}] \u003c [\mathrm{OH^-}]$$

Question 13

A $$4.36\ \mathrm{g}$$ sample of an unknown alkali metal hydroxide is dissolved in $$100.0\ \mathrm{mL} of $$water. It is titrated with $$2.50\ \mathrm{M}$$ HCl, and the endpoint is reached at $$17.0\ \mathrm{mL}. $$What is the molar mass of the metal hydroxide if the reaction is $$\mathrm{MOH} + \mathrm{HCl} \rightarrow \mathrm{MCl} + \mathrm{H_2O}$$?

Accepted Answer

$$102\ \mathrm{g/mol}$$

Question 14

Which element has the greatest electronegativity in the periodic table?

Accepted Answer

Fluorine

Question 15

Which noble gas does NOT have a full octet?

Accepted Answer

Helium

Question 16

What is the formal charge on sulfur in $$\mathrm{SO_4$^{2-}}$$?

Accepted Answer

0

Question 17

Which of the following best describes a non-electrolyte?

Accepted Answer

A substance that does not ionize in solution and no electrical conduction takes place.

Question 18

Which solution will contain the greatest concentration of ions when dissolved in water?

Accepted Answer

$$\mathrm{Na_3PO_4}$$

Question 19

Which element is present in both metal oxides and non-metal oxides?

Accepted Answer

Oxygen

Question 20

Which of the following is a metalloid commonly used as a semiconductor in electrical circuits?

Accepted Answer

Silicon

Comprehensive Study Guidance for GOB Chemistry Mock Exam

Guida di studio - Domande di pratica

Study guide - Flashcard