Question 1 of 23
2.0/ 2.0 Points
"When filling orbitals of equal energy, electrons fill them singly first with parallel spins." This is known as:
A.Pauli exclusion principle.
Correct B.Hund's rule.
C.Bohr's model.
D.Ground state.
E.none of the above
Answer Key: B
Question 2 of 23
0.0/ 2.0 Points
Which form of electromagnetic radiation has the highest frequency?
A.Infrared Radiation
B.Radio Waves
Incorrect C.X-rays
D.Microwaves
E.Gamma Rays
Answer Key: E
Question 3 of 23
2.0/ 2.0 Points
Which form of electromagnetic radiation has the shortest wavelength?
Correct A.Gamma Rays
B.Microwaves
C.Radio Waves
D.X-rays
E.Infrared Radiation
Answer Key: A
Part 2 of 8 - 4.0/ 6.0 Points
Question 4 of 23
2.0/ 2.0 Points
Which compound listed below will dissolve in carbon tetrachloride, CCl4?
A.NH3
Correct B.CS2
C.NaCl
D.all of the compounds
E.none of the compounds
Answer Key: B
Question 5 of 23
2.0/ 2.0 Points
Which of the following statements is TRUE for the covalent molecule HCl?
A.Hydrogen is more electronegative and the shared electron pair is likely to be found on the chlorine atom.
Correct B.Chlorine is more electronegative and the shared electron pair is likely to be found on the chlorine atom.
C.Hydrogen is more electronegative and the shared electron pair is likely to be found on the hydrogen atom.
D.Chlorine is more electronegative and the shared electron pair is likely to be found on the hydrogen atom.
E.none of the above
Answer Key: B
Question 6 of 23
0.0/ 2.0 Points
What is the molecular geometry of SCl2?
A.bent
Incorrect B.tetrahedral
C.trigonal pyramidal
D.linear
E.not enough information
Answer Key: A
Part 3 of 8 - 6.0/ 6.0 Points
Question 7 of 23
2.0/ 2.0 Points
What is the temperature (°C) of 2.48 moles of gas stored in a 30.0 L container at 1559 mm Hg? (R= 0.0821 L atm/ mol K)
A.302
B.-84
C.189
Correct D.29
E.none of the above
Answer Key: D
Question 8 of 23
2.0/ 2.0 Points
A 325 mL sample of gas is initially at a pressure of 721 torr and a temperature of 32°C. If this gas is compressed to a volume of 286 mL and the pressure increases to 901 torr, what will be the new temperature of the gas (reported to three significant figures in °C)?
Correct A.62.4°C
B.215°C
C.35.2°C
D.335°C
E.none of the above
Answer Key: A
Question 9 of 23
2.0/ 2.0 Points
What is the equivalent pressure of 1520 torr in units of atm?
Correct A.2.00
B.1520
C.380.
D.203,000
E.none of the above
Answer Key: A
Part 4 of 8 - 6.0/ 6.0 Points
Question 10 of 23
2.0/ 2.0 Points
What happens as you start to add heat to a solid substance?
A.Heating of the now formed liquid results in increasing the liquid temperature.
B.Increasing the rate of heating of a substance at its melting point only causes more rapid melting.
C.When the melting point is reached, the thermal energy is sufficient to overcome intermolecular forces holding the components at their stationary points.
D.Thermal energy causes the components of the solid to vibrate faster.
Correct E.all of the above
Answer Key: E
Question 11 of 23
2.0/ 2.0 Points
Which intermolecular force is the strongest?
A.X-forces
Correct B.hydrogen bonding
C.dipole-dipole forces
D.dispersion forces
E.none of the above
Answer Key: B
Question 12 of 23
2.0/ 2.0 Points
How much energy does it take to melt a 16.87 g ice cube?\f[\Delta H_{fus} = 6.02 kJ/mol\f]
Correct A.5.64 kJ
B.108 kJ
C.102 kJ
D.936 J
E.none of the above
Answer Key: A
Part 5 of 8 - 4.0/ 6.0 Points
Question 13 of 23
0.0/ 2.0 Points
The solubility of gases in water:
A.is independent of temperature.
B.decreases with increasing temperature.
Incorrect C.increases with increasing temperature.
D.gases are not soluble in water.
E.none of the above
Answer Key: B
Question 14 of 23
2.0/ 2.0 Points
Given that you wished to use exactly 0.325 mole of NaCl to prepare a 2.50 M NaCl solution, how many milliliters of solution must you prepare?
A.0.130 mL
B.0.813 mL
Correct C.130. mL
D.7.69 mL
E.none of the above
Answer Key: C
Question 15 of 23
2.0/ 2.0 Points
When preparing sodium hydroxide solution, it is best to use water that does not contain any dissolved carbon dioxide as it reacts with the sodium hydroxide. Removing the carbon dioxide can be accomplished by:
Correct A.boiling the water.
B.vigorously stirring the solution.
C.using water fresh out of the purification system.
D.Nothing can be done to remove dissolved gases.
E.none of the above
Answer Key: A
Part 6 of 8 - 2.0/ 6.0 Points
Question 16 of 23
0.0/ 2.0 Points
Which of the following is a weak base?
Incorrect A.sodium fluoride
B.ammonia
C.potassium hydroxide
D.calcium hydroxide
E.none of the above
Answer Key: B
Question 17 of 23
0.0/ 2.0 Points
In the following reaction: HCO3- (aq) + H2O (aq) → H2CO3 (aq) + OH- (aq)
A.H2O is an acid and H2CO3 is its conjugate base.
Incorrect B.HCO3- is an acid and OH- is its conjugate base.
C.H2O is an acid and HCO3- is its conjugate base.
D.H2O is an acid and OH- is its conjugate base.
E.HCO3- is an acid and H2CO3 is its conjugate base.
Answer Key: D
Question 18 of 23
2.0/ 2.0 Points
In examining the formula for acetic acid, HC2H3O2, the ionizable hydrogen atom(s) is/are
A.all of the H's on the right-side.
Correct B.the H on the left.
C.all four H's.
D.one of the H's on the right-side.
E.none of the above.
Answer Key: B
Part 7 of 8 - 4.0/ 6.0 Points
Question 19 of 23
2.0/ 2.0 Points
Which of the following terms could NOT be applied to the compound CH2=CHCH2CH2OH?
A.an alcohol
B.unsaturated
C.an alkene
Correct D.a carboxylic acid
E.none of the above
Answer Key: D
Question 20 of 23
0.0/ 2.0 Points
The reaction
CH3CH3 + Br2 → CH3CH2Br + HBr
would best be described as:
A.combustion.
B.substitution.
C.addition.
D.hydrogenation.
Incorrect E.none of the above
Answer Key: B
Question 21 of 23
2.0/ 2.0 Points
Which is the name of C5H12?
A.n-butane
B.n-heptane
Correct C.n-pentane
D.n-hexane
E.all of the above
Answer Key: C
Part 8 of 8 - 2.0/ 4.0 Points
Question 22 of 23
0.0/ 2.0 Points
Which protein structure provides the arrangement of polypeptides?
Incorrect A.Primary Structure
B.Secondary Structure
C.Tertiary Structure
D.Quaternary Structure
E.Pental Structure
Answer Key: D
Question 23 of 23
2.0/ 2.0 Points
All of the carbohydrates below are hexoses EXCEPT:
A.fructose.
B.galactose.
C.glucose.
D.both A and B
Correct E.Glucose, fructose and galactose are all hexoses.
Answer Key: E
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