Question 1

Which of the following best describes a chemical change?

Accepted Answer

Rusting of iron in the presence of oxygen and water

Question 2

A sample contains 3.0 mol of oxygen molecules ($$\mathrm{O_2$}). $$How many oxygen atoms are present in the sample?

Accepted Answer

$$3.6 	imes 10$$^{24}$$ atoms

Question 3

Which diagram best represents the effect of the reaction $$2\mathrm{H_2$} + \mathrm{O_2$} \rightarrow 2\mathrm{H_2O} at $$the molecular level?

Accepted Answer

Two $$\mathrm{H_2$}$$ molecules and one $$\mathrm{O_2$}$$ molecule combine to form two $$\mathrm{H_2O}$$ molecules.

Question 4

Which of the following is the correct electron configuration for a neutral oxygen atom?

Accepted Answer

$$1s^2$$ $$2s^2$$ $$2p^4$$

Question 5

Which of the following best explains why water is a polar molecule?

Accepted Answer

Water has a bent molecular geometry and oxygen is more electronegative than hydrogen.

Question 6

A student mixes 50.0 mL of 1.0 M NaCl with 50.0 mL of 1.0 M AgNO$$_3. $$What is the mass of AgCl precipitate formed? ($$\mathrm{AgCl}$$ molar mass = 143.32 g/mol)

Accepted Answer

0.72 g

Question 7

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

Accepted Answer

O=C=O with two lone pairs on each oxygen

Question 8

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

Accepted Answer

Ionic bonds involve the transfer of electrons, while covalent bonds involve the sharing of electrons.

Question 9

Which of the following elements has the highest first ionization energy?

Accepted Answer

Fluorine

Question 10

A gas sample at 1.0 atm and 273 K occupies 22.4 L. If the pressure is doubled and the temperature is halved, what is the new volume?

Accepted Answer

5.6 L

Question 11

Which of the following is the correct formula for ammonium sulfate?

Accepted Answer

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

Question 12

Which of the following best describes the molecular geometry of methane ($$\mathrm{CH_4$}$$)?

Accepted Answer

Tetrahedral

Question 13

Which of the following is a correct balanced chemical equation for the combustion of propane ($$\mathrm{C_3H_8}$$)?

Accepted Answer

$$\mathrm{C_3H_8} + 5\mathrm{O_2$} \rightarrow 3\mathrm{CO_2$} + 4\mathrm{H_2O}$$

Question 14

Which of the following is the correct electron configuration for the $$\mathrm{Fe$$^{3+}$$}$$ ion?

Accepted Answer

$$[Ar] 3d^5$ 4s^0$

Question 15

Which of the following statements about the periodic table is correct?

Accepted Answer

Elements in the same group have similar chemical properties.

Question 16

Which of the following is the correct net ionic equation for the reaction between aqueous solutions of Na$$_2SO$_4$$ and BaCl$$_2$$?

Accepted Answer

$$\mathrm{Ba$$^{2+}$$ (aq) + SO_4$^{2-} (aq) \rightarrow $$BaSO_4$$ (s)}$$

Question 17

Which of the following best explains why noble gases are generally unreactive?

Accepted Answer

They have completely filled valence electron shells.

Question 18

Which of the following is the correct formula for the compound formed between magnesium and nitrogen?

Accepted Answer

$$\mathrm{Mg_3N_2}$$

Question 19

Which of the following best describes the hybridization of the central atom in ammonia ($$\mathrm{NH_3$}$$)?

Accepted Answer

$$sp^3$$

General Chemistry I: Comprehensive Study Notes for Final Exam Preparation

스터디 가이드 - 연습 문제

학습 가이드 - 플래시카드