Chem 101 Finals Study

Ch 1, 2, 3

100

What is the identity of element X if the ion X^-1 contains 16 electrons?

_{A) Sulfur
B) Silicon
C)  Oxygen 
D)  Phosphorus}

D) Phosphorus

200

Which molecule is the limiting reactant? 

2LiF + Rb₂S -> Li₂S + 2RbF

If 40.0g LiF & 225.5gRb₂S

A) LiF
B) Rb₂S
C) Li₂S
D) RbF

B) Rb₂F

300

If the percent yield for the following reaction is 47.3%, how many grams of Mg₃N₂ are needed to
produce 27.2 g of N₂?

Mg₃N₂ -> 3Mg + N₂

_{A) 207.2g
B) 46.4g
C) 414.3g
D) 185.9g}

A) 207.2g

400

Find the Empirical formula of: 23.02% Ba, 7.37% Al, 42.52% O, 27.09% Cl

A) Ba₃Al₅O₄₈Cl₁₄
B) Ba₅Al₄O₅₀Cl₁₀
C) Ba₁₂Al₇O₅₆Cl₂₇
D) Ba₂₈Al₉O₅₂Cl₃₃

A) Ba₃Al₅O₄₈Cl₁₄

500

Bromine has an atomic mass of 79.904 amu. The Br-77 (76.832 amu) is 40.013%. What is the
amu of the other isotope?
A)  84.510 amu
B)  81.853 amu
C)  74.783 amu
D)  82.143 amu

B) 81.853 amu

Ch 4, 5

100

Which of the following reactions are most likely to occur?

A) Mn + Mg^- -> Mn^- + Mg
B) Pb + Sn²⁺ -> Pb²⁺ + Sn
C) Zn + Cu^2- -> Zn^2-+ Cu
D) Au + Li⁺ -> Au⁺ + Li

C) Zn + Cu^2- -> Zn^2-+Cu

200

Which one of the following compounds is insoluble in water?

A) Li₂CO₃
B) CsCl
C) SO₄Pb
D) BPO₄

D) BPO₄

300

Calculate ΔH for the following reaction:
CH_4(g) + 2O_2(g) -> CO_2(g) + 2H₂O_(g).       ΔH=?
C_(s) + O_2(g) -> CO_2(g).           ΔH= -393.5kJ/mol
H_2(g) +1/2O₂  -> H₂O_(l).        ΔH= -285.8kJ/mol
CH_4(g) -> C_(s) + 2H_2(g).         ΔH= +74.8kJ/mol

A) -754.1kJ.mol
B) -1039.9kJ/mol
C) -890.3kJ/mol
D) -604.5kJ/mol

C) -890.3kJ/mol

400

A 22.5mL sample of an Acetic acid solution required 38.4mL of 1.719M NaOH for neutralization. What is the concentration of Acetic Acid?

A) 1.007M
B) 2.934M
C) 0.993M
D) 0.341M

B) 2.934M

500

A 1.625g sample of Benzoic Acid (MM=122.12g/mol) is burned in a bomb calorimeter. The heat capacity of the calorimeter is 7.93kJ/*C. During the combustion, the temperature of the calorimeter increases from 17.63*C to 42.67*C. What is the Molar heat of combustion on Benzoic Acid?

A) -14900 kJ/mol
B) +14900 kJ/mol
C) -237 kJ/mol
D) +237 kJ/mol

A) -14900 kJ/mol 

(exothermic reaction is Molar heat is negative)

Ch 6, 7

100

What is the electron configuration of Antimony(Sb)?

A) 1s²2s²2p⁶3s²3p⁶4s²4d¹⁰4p⁶5s²5d¹⁰5p³
B) 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s²4d¹⁰5p³
C) 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s²4d¹⁰5p⁶
D) [Ar]5s²4d¹⁰5p³

B) 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s²4d¹⁰5p³

200

Calculate the wavelength of a radio wave with a frequency of 32MHz. (1MHz=10⁶ 1/s)
(λ=c/v)

A) 0.11 m
B) 9.4 m
C) 1100m
D) 0.94 m

B) 9.4 m

300

An electron cannot have the quantum numbers?
(n,l,m_l)

A) 5, 3, 2
B) 2, 1, -2
C) 3, 2, -1
D) 3, 0, 0

B) 2, 1, -2

400

Which of the following trends increase positively the further up and right on the periodic table?
(Select all that apply)

A) Electron Affinity
B) Ionization Energy
C) Electronegativity
D) Atomic Radius

B) Ionization Energy
C) Electronegativity

500

Determine the mass of an electron traveling at 4.25x10⁹m/s with a wavelength of 3.44x10^-4.
(λmv=h)

A) 4.53 x 10^-40 Kg
B) 5.36 x 10^-47 Kg
C) 8.19 x 10^-21 Kg
D) 4.53 x 10²⁸ Kg

A) 4.53 x 10^-40 Kg

Ch 8, 9

100

How many Sigma and Pi bonds are in the molecule?

A) (σ): 15  (π): 4
B) (σ): 11  (π): 8
C) (σ): 25 (π): 4
D) (σ): 4  (π): 15

C) (σ): 25 (π): 4

200

Which element is the most Electronegative?

A) Cs
B) S
C) Al
D) Cl

D) Cl

300

What is the hybridization of the right Carbon?

A) sp
B) sp²
C) sp³
D) sp³d

B) sp²

400

Using molecular orbital theory which species is Paramagnetic?(OFNe, BCN)

A) B₂
B) C₂
C) N₂
D) O₂

D) O₂

500

What is the Bond order of F₂?

A) 1
B) 3
C) 4
D) 8

A) 1

Ch 10, 11

100

What are the STP?

A) 1mol, 22.4L, 0*C, 1atm
B) 1mol, 11.0L, 0*C, 1mmHg
C) 1mol, 22.4L, 0*K, 1atm
D) 1mol, 11.0L, 0*K, 1mmHg

A) 1mol, 22.4L, 0*C, 1atm

200

Order the attraction forces from weakest to greatest

A) H-Bonding, Ion-DIpole, Dipole-Dipole, London Dispersion
B) London Dispersion, Dipole-Dipole, Ion-Dipole, H-Bonding
C) Dipole-Dipole, Ion-Dipole, London Dispersion, H-Bonding
D) London Dispersion, Dipole-Dipole, H-Bonding, Ion-Dipole

D) London Dispersion, Dipole-Dipole, H-Bonding, Ion-Dipole

300

Which substance has the greatest Boiling point?

A) CH₄
B) C₂H₆
C) C₃H₈
D) C₆H₁₂

D) C₆H₁₂

(Largest surface area)

400

Using Real Gas Laws what is the pressure of 20.0g O₂ at 35.0*C and 18.0L?
Given that a= 1.360 L²atm/mol² & b=0.0318L mol^-1
(P+n²a/v²)(V-nb)=nRT

A) 0.877atm
B) 0.900atm
C) 1.753atm
D) 0.0982atm

A) 0.877atm

500

Using the Phase diagram in which region might you find Superficial Fluid?

A) Region C
B) Region D
C) Region E
D) Region G

D) Region G