Question 1

Which of the following statements about atoms is correct?

Accepted Answer

Atoms are composed of three subatomic particles: protons, neutrons, and electrons.

Question 2

What is the ground state electron configuration of elemental titanium (Ti)?

Accepted Answer

$$[Ar]4s^2$ 3d^2$

Question 3

A photon of light has a wavelength of 520 nm. What is its energy in kJ/mol?

Accepted Answer

$$2.30 	imes 10^2$ kJ/mol

Question 4

Which quantum numbers are needed to determine the energy of an electron in a many-electron atom?

Accepted Answer

n and l

Question 5

Which of the following ionic compounds has the largest molar mass?

Accepted Answer

Mercury (II) iodide

Question 6

Which of the following best describes a covalent bond?

Accepted Answer

A system of two atoms with a bonding pair of electrons located exactly between the two nuclei.

Question 7

Which of the following ions has the largest radius?

Accepted Answer

$$I^-$$

Question 8

Which of the following compounds has the largest lattice energy ($$U$$)?

Accepted Answer

$$MgO$$

Question 9

What is the best description for molarity as a unit of concentration?

Accepted Answer

The number of moles of solute per liter of solution.

Question 10

Which of the following best describes the ionization energy of an element?

Accepted Answer

The energy required to remove an electron from a neutral atom in the gas phase.

Question 11

A 6.80 g coin was dissolved in nitric acid and 6.21 g of $$AgCl$$ was precipitated by the addition of excess sodium chloride. Calculate the percentage of silver (by mass) in the coin. (Atomic Molar Masses: Ag: 107.9, Cl: 35.5 g/mol)

Accepted Answer

97.1%

Question 12

Which of the following is the best description of the geometry of a molecule with four electron domains and no lone pairs on the central atom?

Accepted Answer

Tetrahedral

Question 13

Which of the following bonds has the largest bond angle?

Accepted Answer

Angle O-Si-O in $$SiO_4$$^{4-}$$

Question 14

Which of the following is the correct net ionic equation for the reaction between barium hydroxide and hydrobromic acid?

Accepted Answer

$$2H^+ + 2OH^- \rightarrow 2H_2O$$

Question 15

Which of the following best describes the hybridization of the central atom in $$CH_4$$?

Accepted Answer

$$sp^3$$

Question 16

What is the maximum amount of $$Ca_3$$($$PO_4)_2$ in grams that can be produced when 750 mg of Na_3PO_4$ are reacted with 1.05 g of $$CaBr_2$$ in H_2O$? (Use the balanced equation: 2Na_3PO_4 + 3$$CaBr_2 \rightarrow $$Ca_3$$($$PO_4)_2 + 6$$NaBr$$)

Accepted Answer

0.311 g

Question 17

Which of the following is the best description of a polar covalent bond?

Accepted Answer

A bond in which electrons are shared unequally between two atoms.

Question 18

Which of the following atoms contains seven neutrons?

Accepted Answer

Atom B: $$A = 14, Z = 7$$

Question 19

Which of the following is the best description of the bond in $$O_3 ($$ozone)?

Accepted Answer

The bond order is 1.5 due to resonance between two equivalent structures.

Question 20

Which of the following ions is isoelectronic with $$Ne$$?

Accepted Answer

$$Na^+$$

General Chemistry Final Exam Practice Guidance

Study Guide - Practice Questions

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