Question 1

Which of the following best describes the difference between mass and weight?

Accepted Answer

Mass is the amount of matter in an object, while weight is the force exerted by gravity on that mass.

Question 2

A student measures the mass of a metal block as $$50.0\ \mathrm{g}$$ and its volume as $$20.0\ \mathrm{cm}^3. $$What is the density of the block?

Accepted Answer

$$2.50\ \mathrm{g/cm}^3$$

Question 3

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

Accepted Answer

Elements are arranged by increasing atomic number, which reflects the number of protons in the nucleus.

Question 4

Which of the following is a chemical change?

Accepted Answer

Iron rusting in moist air

Question 5

A sample of gas occupies $$2.00\ \mathrm{L} at$$ $$1.00\ \mathrm{atm}$$ and $$300\ \mathrm{K}. If $$the pressure is increased to $$2.00\ \mathrm{atm}$$ and the temperature is raised to $$600\ \mathrm{K}$$, what is the new volume? (Assume ideal gas behavior.)

Accepted Answer

$$4.00\ \mathrm{L}$$

Question 6

Which of the following best describes the octet rule?

Accepted Answer

Atoms tend to gain, lose, or share electrons to achieve eight electrons in their valence shell.

Question 7

Which of the following compounds contains a polar covalent bond?

Accepted Answer

$$\mathrm{H_2O}$$

Question 8

How many moles are present in $$18.0\ \mathrm{g} of $$water ($$\mathrm{H_2O}$$)? (Molar mass of $$\mathrm{H_2O} = 18.0\ \mathrm{g/mol})$$

Accepted Answer

$$1.00\ \mathrm{mol}$$

Question 9

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

Accepted Answer

$$\mathrm{HCl} + \mathrm{NaOH} \rightarrow \mathrm{NaCl} + \mathrm{H_2O}$$

Question 10

Which of the following is a property of a strong acid?

Accepted Answer

It completely ionizes in aqueous solution.

Question 11

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

Accepted Answer

$$\mathrm{$$MgCl_2$$}$$

Question 12

Which of the following is an example of a redox reaction?

Accepted Answer

$$\mathrm{2Na} + \mathrm{Cl_2$} \rightarrow 2\mathrm{NaCl}$$

Question 13

Which of the following best describes the greenhouse effect?

Accepted Answer

Greenhouse gases absorb infrared radiation and re-emit it, warming the Earth's atmosphere.

Question 14

Which of the following is a correct statement about the kinetic-molecular theory of gases?

Accepted Answer

Gas particles are in constant, random motion and collisions between them are elastic.

Question 15

Which of the following is the correct Lewis symbol for a chloride ion ($$\mathrm{Cl^-}$$)?

Accepted Answer

$$\mathrm{[Cl]^{-}}$$ with 8 dots around the symbol

Question 16

Which of the following is an aromatic compound?

Accepted Answer

Benzene ($$\mathrm{C_6H_6})$$

Question 17

A solution is prepared by dissolving $$10.0\ \mathrm{g} of $$NaCl in enough water to make $$500.0\ \mathrm{mL} of $$solution. What is the molarity of the solution? (Molar mass of NaCl = $$58.5\ \mathrm{g/mol})$$

Accepted Answer

$$0.342\ \mathrm{mol/L}$$

Question 18

Which of the following is a correct statement about intermolecular forces?

Accepted Answer

Hydrogen bonding is a type of strong dipole-dipole interaction that occurs when hydrogen is bonded to N, O, or F.

Question 19

Which of the following is a correct application of the law of conservation of mass?

Accepted Answer

The total mass of reactants equals the total mass of products in a chemical reaction.

Question 20

Which of the following is a correct statement about the mole?

Accepted Answer

A mole contains $$6.022 	imes 10$$^{23}$$ particles of a substance.

CHEM 1018 Final Exam Review: Comprehensive Study Notes

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