Final Exam

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Question #1

What is the net ionic equation for the reaction that occurs between ammonium chloride and lead (II) nitrate.

A Cl-(aq) + Pb2+(aq) →PbCl2(s)

B NH4Cl(aq) + PbNO3(aq) →PbCl(s) + NH4NO3(aq)

C NH3Cl(aq) + PbNO3(aq) →PbCl(s) + NH3NO3(aq)

D NH4+(aq) + NO3-(aq) → NH4NO3(aq)

E NH4Cl(aq) + Pb(NO3)2(aq) →PbCl2(s) + NH4NO3(aq)

Question #2

Is carbon tetrachloride a polar or nonpolar molecule?

A nonpolar

B not possible to tell without electronegativity values

C polar

Question #3

The strongest interactions between molecules of hydrogen ( H2) are

A dipole-dipole.

B polar covalent.

C hydrogen bonds.

D dispersion forces.

E ionic bonds.

Question #4

A polar covalent bond is found in which of these compounds?

A NaCl

B N2

C F2

D H2O

E H2

Question #5

The number of electrons in an ion with 20 protons and an ionic charge of 2+ is

A 18

B 22

C 16

D 24

E 20

Question #6

Which of the following measurements clearly shows three significant figures?

A 0.051 m

B 5100 m

C 510 m

D 0.510 m

E 0.005 m

Question #7

The empirical formula of a compound is NO2, and its molar mass is about 92.g. What is its molecular formula?

A N2O

B N3O6

C N2O4

D NO2

Question #8

Which of the following is a property of a solid?

A It takes the shape of the container.

B The interactions between its particles are very weak.

C The particles have fixed positions and are very close together.

D It fills the volume of the container.

E The particles move at a rapid rate.

Question #9

What is the abbreviated electron configuration for tellurium (Te)?

A [Kr] 5s2 5d10 5p4

B [Kr] 5s2 5p6 5d4

C [Cd] 5p4

D [Sr] 4d10 5p4

E [Kr] 5s2 4d10 5p4

Question #10

Predict the products for the following reaction (ignore balancing):

tin(II) nitrate (aq) + potassium phosphate (aq) –> ________________________________

A Sn3(PO4)4 (s) + K (s) + NO2 (g)

B Sn3(PO4)2 (s) + KNO3 (aq)

C No reaction

D SnPO4 (s) + KNO3 (aq)

E Sn3(PO4)2 (aq) + KNO3 (aq)

Question #11

Calculate the mass of acid dissolved in 389 mL of 0.725 M HF.

A 5.93 g

B 10.3 g

C 5.64 g

D 16.5 g

E 5.77 g

Question #12

The +3 ion of indium-111 (111In3+) consist of:

A 111 neutrons, 49 protons and 46 electrons

B 62 neutrons, 46 protons and 49 electrons

C 62 neutrons, 49 protons and 49 electrons

D 111 neutrons, 46 protons and 49 electrons

E 62 neutrons, 49 protons and 46 electrons

Question #13

Urea (CN2H4O) can be synthesized by a controlled reaction of ammonia and carbon dioxide via the following equation:

2 NH3 (g) + CO2 (g) ⟶ CN2H4O (s) + H2O (l) [balanced]

What mass of urea (MM = 60.07 g/mol) will be produced by the reaction of a mixture of 19.0 g of ammonia with 15.2 g of carbon dioxide? (Assume that the reaction goes to completion.)

A 20.7 g

B 33.5 g

C 67.0 g

D 19.0 g

E 913 g

Question #14

The predicted VSEPR molecular shape for CF2O.

A Trigonal Pyramidal

B Square Planar

C Trigonal Planar

D Tetrahedral

E Bent

Question #15

Calculate the pressure exerted by 5.12 grams of chlorine gas in a 850. mL sealed flask at 27.0 ∘C.

A 2.09 atm

B 4.19 atm

C 148 atm

D 0.188 atm

E 20.9 atm

Question #16

Solid mercury(II) oxide decomposes when heated forming liquid mercury and oxygen gas as the only products. What mass of mercury(II) oxide must be decomposed in order to collect 0.386 L of oxygen gas under STP conditions?

A 80.5 g

B 7.46 g

C 14.8 g

D 41.8 g

E 167 g

Question #17

How many individual formaldehyde (CH2O = 30.03 g/mol) are found in a 32.0 mL sample of gaseous formaldehyde? The density of formaldehyde is 0.815 g/mL.

A 7.87 x 1023 molecules

B 6.42 x 1023 molecules

C 0.868 molecules

D 5.23 x 1023 molecules

E 4.72 x 1026 molecules

Question #18

The molecule that contains two sulfur atoms and two chlorine atoms is named:

A sulfur monochloride

B disulfur dichlorine

C sulfur chloride

D disulfur dichloride

E disulfide dichlorine

Question #19

Convert 98.67 gal/m2 to mL/pm2.

A 3.735 x 10-7 mL/pm2

B 2.607 x 10-25 mL/pm2

C 3.735 x 10-19 mL/pm2

D 2.607 x 10-20 mL/pm2

E 3.735 x 10-25 mL/pm2

Question #20

Classify the following reaction:

Li2O (s) + H2O (l) ⟶ 2 LiOH (aq) [balanced]

A Decomposition

B Combination (Synthesis)

C Double displacement

D Single displacement

E Combustion

Question #21

A sample of argon gas in a balloon has a volume of 438 mL at a temperature of 17.0 oC. The gas temperature is then changed, and the volume increases to 837 mL. Assuming constant pressure, what is the new gas temperature in the balloon?

A 152oC

B -121oC

C 8.90oC

D 554oC

E 281oC

Question #22

Which of the following molecules would be expected to observe the highest melting point?

A NH3

B Cannot determine from the information provided.

C AsH3

D CO2

E PH3

Question #23

Consider the combustion of octane (C8H18), given the following unbalanced equation:

_____ C8H18 + _____ O2 ⟶ _____CO2 + _____H2O [unbalanced]

What is the mass of H2O (MM = 18.02 g/mol) will be generated by the complete combustion of 79.8 g of octane in excess oxygen?

A 22.7 g

B 113 g

C 4.54 g

D 227 g

E 79.8 g

Question #24

What is the symbol of the element in Period 4 and Group 2A(2)?

A Be

B Mg

C C

D Ca

E Si

Question #25

Calculate the volume (in cm3) of 358 ng of manganese. The density of manganese is 7.20 g/cm3.

A 2.58 x 10-9 cm3

B 4.97 x 1010 cm3

C 4.97 x 10-8 cm3

D 4.97 x 101 cm3

E 2.58 x 10-6 cm3

Question #26

The conjugate base of HClO3 is

A Cl(OH)2

B HClO2

C ClO3-

D HClO

E ClO3

Question #27

Calculate the pressure exerted by 5.12 grams of chlorine gas in a 850. mL sealed flask at 27.0oC.

A 2.09 atm

B 0.188 atm

C 20.9 atm

D 148 atm

E 4.19 atm

Question #28

Predict the products for the following reaction (ignore balancing):

Zn (s) + CrSO4 (aq) ⟶ ______________________________________

A Zn(SO4)2 (aq) + Cr (s)

B No reaction

C ZnSO4 (aq) + Cr (s)

D ZnO (s) + Cr (s) + SO3 (g)

E ZnCr (s) + S8 (s) + O2 (g)

Question #29

An aqueous solution has a OH- concentration of 2.6 x 10-7 M. Calculate the pH of this solution.

A +7.42

B +6.59

C 6.58

D +0.42

E -7.42

Question #30

During a certain titration, 35.0 mL of 0.175 M aqueous sulfuric acid was required to exactly neutralize 49.0 mL of sodium hydroxide. Determine the molarity of the base.

H2SO4 (aq) + 2 NaOH (aq) ⟶ 2 H2O (l) + Na2SO4 (aq) [balanced]

A 0.175 M

B 6.00 x 10-4 M

C 0.125 M

D 0.600 M

E 0.250 M

Question #31

What is the correct name for SnCO3?

A tin(II) oxalate

B tin(II) acetate

C tin carbonate

D tin(IV) carbonate

E tin(II) carbonate

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