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

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

C NH4+(aq) + NO3-(aq) → NH4NO3(aq)

D Cl-(aq) + Pb2+(aq) →PbCl2(s)

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

Question #2

Is carbon tetrachloride a polar or nonpolar molecule?

A polar

B nonpolar

C not possible to tell without electronegativity values

Question #3

The strongest interactions between molecules of hydrogen ( H2) are

A ionic bonds.

B dipole-dipole.

C hydrogen bonds.

D dispersion forces.

E polar covalent.

Question #4

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

A F2

B H2O

C NaCl

D N2

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 24

D 20

E 16

Question #6

Which of the following measurements clearly shows three significant figures?

A 0.051 m

B 0.510 m

C 5100 m

D 0.005 m

E 510 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 N3O6

B N2O

C NO2

D N2O4

Question #8

Which of the following is a property of a solid?

A It takes the shape of the container.

B The particles move at a rapid rate.

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

D It fills the volume of the container.

E The interactions between its particles are very weak.

Question #9

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

A [Kr] 5s2 4d10 5p4

B [Kr] 5s2 5d10 5p4

C [Cd] 5p4

D [Kr] 5s2 5p6 5d4

E [Sr] 4d10 5p4

Question #10

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

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

A SnPO4 (s) + KNO3 (aq)

B No reaction

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

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

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

Question #11

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

A 16.5 g

B 5.77 g

C 5.93 g

D 10.3 g

E 5.64 g

Question #12

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

A 62 neutrons, 46 protons and 49 electrons

B 62 neutrons, 49 protons and 49 electrons

C 62 neutrons, 49 protons and 46 electrons

D 111 neutrons, 46 protons and 49 electrons

E 111 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 67.0 g

B 19.0 g

C 33.5 g

D 913 g

E 20.7 g

Question #14

The predicted VSEPR molecular shape for CF2O.

A Bent

B Square Planar

C Tetrahedral

D Trigonal Planar

E Trigonal Pyramidal

Question #15

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

A 4.19 atm

B 0.188 atm

C 148 atm

D 20.9 atm

E 2.09 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 167 g

B 14.8 g

C 7.46 g

D 80.5 g

E 41.8 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 5.23 x 1023 molecules

B 0.868 molecules

C 4.72 x 1026 molecules

D 7.87 x 1023 molecules

E 6.42 x 1023 molecules

Question #18

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

A disulfur dichloride

B disulfide dichlorine

C disulfur dichlorine

D sulfur monochloride

E sulfur chloride

Question #19

Convert 98.67 gal/m2 to mL/pm2.

A 2.607 x 10-25 mL/pm2

B 3.735 x 10-7 mL/pm2

C 3.735 x 10-19 mL/pm2

D 3.735 x 10-25 mL/pm2

E 2.607 x 10-20 mL/pm2

Question #20

Classify the following reaction:

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

A Combination (Synthesis)

B Decomposition

C Double displacement

D Combustion

E Single displacement

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 -121oC

B 8.90oC

C 152oC

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 CO2

D AsH3

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 79.8 g

E 227 g

Question #24

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

A Si

B Ca

C Be

D Mg

E C

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 10-6 cm3

B 4.97 x 10-8 cm3

C 4.97 x 1010 cm3

D 4.97 x 101 cm3

E 2.58 x 10-9 cm3

Question #26

The conjugate base of HClO3 is

A Cl(OH)2

B ClO3

C HClO2

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 0.188 atm

B 148 atm

C 20.9 atm

D 2.09 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 ZnSO4 (aq) + Cr (s)

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

D No reaction

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 +0.42

B +7.42

C 6.58

D +6.59

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 0.125 M

C 0.600 M

D 6.00 x 10-4 M

E 0.250 M

Question #31

What is the correct name for SnCO3?

A tin(II) acetate

B tin(IV) carbonate

C tin(II) carbonate

D tin carbonate

E tin(II) oxalate

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