Organic Chemistry Questions
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Organic Chemistry
Practical DetectionWhich statements below that is true of ß decay?
Select the correct answer below:
OIt is most likely to occur when the nucleus is in an excited state.
It decreases the nuclide's mass number.
It increases the nuclide's mass number.
It is most likely to occur when the neutron:proton (n:p) ratio of the nuclide is too large.
Organic Chemistry
General organic chemistryThe oxygen in the air we breath is classified as:
the solvent in a simple mixture.
the solute in a homogeneous gas mixture.
the solute in a heterogeneous gas-liquid mixture.
the solvent in a homogeneous gas mixture
Organic Chemistry
General organic chemistryIf the half-life of a radioactive isotope is 12 hours, what percentage of the initial sample will remain after 36 hours?
Organic Chemistry
General organic chemistryWhich fact about fuel cells is FALSE?
Fuel cell automobiles are powered by water and the only emission is hydrogen.
Fuel cell automobiles are environmentally friendly.
Fuel cell automobiles are whisper quiet.
Fuel cells are based on the tendency of some elements to gain electrons from other elements.
Organic Chemistry
General organic chemistryMetalloids have properties of metals and nonmetals. Under certain conditions, a metalloid may behave as a metal and under another condition, the "the same metalloid" may behave as a nonmetal. Some metalloids are used in semiconductors.
True
False
Organic Chemistry
General organic chemistryDuring spontaneous fission, a nucleus of 98Cf254 can produce 108 Pd 46 and what other nuclide?
Organic Chemistry
General organic chemistryWrite a balanced nuclear equation for the following reaction. Give all nuclei in the form ZX A.
Decay of curium-243 by α emission:
-
Organic Chemistry
Practical DetectionUnlike a change in concentration or pressure, a change in temperature will affect the
Select the correct answer below:
rate of the forward reaction
rate of the reverse reaction
equilbrium constant
none of the above
Organic Chemistry
General organic chemistryIn the reaction above, what will happen to the reaction rate if (circle your answer):
a) The concentration of alky bromide is doubled.
b) The concentration of methanol is doubled.
Organic Chemistry
General organic chemistryWhat will happen to the following equilibrium if the volume of the vessel in which the equilibrium is contained increases?
2CH4 (G) C₂H6 (G) + H₂(g)
Select the correct answer below:
It will shift to the right.
It will shift to the left.
There will be no change.
It depends on the factor by which the volume increases.
Organic Chemistry
General organic chemistryFrom what you know of the activity of the halogens:
Will the following reaction occur?
Br₂ + HF ->
True
False
Organic Chemistry
General organic chemistryWhy is the N-H bond in an amine a polar covalent bond?
Hydrogen is more electronegative than nitrogen
Nitrogen is more electropositive than hydrogen
Nitrogen is more electronegative than hydrogen
Hydrogen is electrophilic.
None of these
Organic Chemistry
General organic chemistryRefer to the precipitation reaction below.
BaCl₂ (aq) + H₂SO4 (aq) → BaSO4 (s) + 2HCl(aq)
How much 0.22 M H₂SO4 solution in liters will completely precipitate the Ba²+ ion in 1.2 L of 0.19 M BaCl₂ solution? Do not include units in your answer, and round to two significant figures.
Provide your answer below:
Organic Chemistry
General organic chemistryA sample of rainwater has a pH of 3.19. Calculate the H₂O concentration in the sample.
[H₂O¹] =
Organic Chemistry
General organic chemistryHow many milliliters of a 0.80 mM ammonium hydroxide solution are required to
create 2.0 L of 0.30 mM solution?
Do not include units in the answer.
Your answer should have two significant figures.
Organic Chemistry
General organic chemistryRefer to the precipitation reaction below. 3CaCl₂ (aq) + 2Na3PO4 (aq) → 6NaCl (aq) + Ca3(PO4)2 (S) How many liters of 0.20 M CaCl₂ will completely precipitate the Ca²+ in 0.50 L of 0.20 M Na3PO4 solution?
Organic Chemistry
General organic chemistryWhich type of reaction is represented by the following? (note: the reaction is not balanced)
K + ZnCl₂ --> Zn + KCI
synthesis
decomposition
single displacement
double displacement
Organic Chemistry
General organic chemistryCalculate the value of [H,O] from the given [O] in each solution and label the solution as acidic
or basic:
(a) [OH] = 8.0 × 10-¹1 M: (b) [OH]=L6x 102 M.
(b) x 10
(c) x 10
Organic Chemistry
General organic chemistryCalculate AH for the reaction 4 NH3 (g) + 5 O₂ (g) → 4 NO (g) + 6 H₂O (g), from the
following data.
N₂ (g) + O₂ (g) → 2 NO (g)
N₂ (g) + 3 H₂ (g) → 2 NH3(g)
2 H₂ (g) + O₂(g) → 2 H₂O(g)
AH--180.5 kJ
AH-91.8 kJ
AH-483.6 kJ
Organic Chemistry
General organic chemistryPlease keep this question open while you are working on it. For this question, please
show your work on a piece of paper. Be sure to include all steps, calculations and
units. Submit a picture of your work to the Unit 3 Test dropbox within 5 minutes of
completing the test.
Calculate AH for the reaction 4 NH3 (g) + 5 O₂ (g) - 4 NO (g) + 6 H₂O (g), from the
following data.
N₂ (g) + O₂(g) → 2 NO (g)
N₂ (g) + 3 H₂(g) → 2 NH₂ (g)
2 H₂(g) + O₂(g) → 2 H₂O(g)
AH--180.5 kJ
AH-91.8 kJ
AH-483.6 kJ
Organic Chemistry
General organic chemistryRefer to the precipitation reaction below.
CaCl₂ (aq) + 2AgNO3 (aq) → Ca(NO3)₂ (aq) + 2AgCl (s)
How much 1.5 M CaCl₂, in liters, will completely precipitate the Ag* in 1.0 L of 0.20 M AgNO, solution?
Organic Chemistry
General organic chemistryWhat is the concentration (in milligrams per milliliter) of a solution of KH₂PO4 if 250 mL of it can be used to prepare 1.0 L of a 0.50 mg/mL solution?
Organic Chemistry
General organic chemistryWhat is true about intermolecular forces?
Select the correct answer below:
They are attractions within a molecule.
They are attractions between molecules or particles.
They are stronger than bonds between atoms.
They only occur in the gas phase.
Organic Chemistry
General organic chemistryDispersion forces occur due to:
Select the correct answer below:
the presence of polar covalent bonds
the temporary asymmetry of electron density
the geometry of particular molecules
none of the above
Organic Chemistry
General organic chemistryWhat will happen to the pressure of a gas if its volume triples (increases by a factor
of three) as the amount of gas and the temperature are held constant?
Select the correct answer below:
The pressure will decrease by a factor of three.
The pressure will triple (increase by a factor of three).
The pressure will double (increase by a factor of two).
The pressure will be cut in half (decrease by a factor of two).
Organic Chemistry
General organic chemistryRefer to the precipitation reaction below.
3BaCl2 (aq) + Al2(SO4)3 (aq) → 2AlCl3 (aq) + 3BaSO4 (s)
2+ in
How much 0.50 M BaCl₂ solution, in liters, will completely precipitate the Ba
1.0 L of 0.15 mol Al₂(SO4)3 solution?
Organic Chemistry
Chemistry in Daily Life1) (solution/solvent/solute) Use the correct word in the following sentence:
dissolved in
makes up a
2) What is the difference between a strong electrolyte and a weak electrolyte?
saturated/supersaturated/unsaturated?
3) As the temperature of the solution (increases/decreases)
solid in that liquid (increases/decreases)
As the temperature of solution (increases/decreases), _the solubility of a
that liquid (increases/decreases)
the solubility of a gas in
Organic Chemistry
General organic chemistryA 12.5 g sample of a compound exerts a pressure of 1.59 atm in a 0.750 L flask at
385 K. What is the molar mass of the compound?
Select the correct answer below:
408 g/mol
189 g/mol
331 g/mol
275 g/mol
Organic Chemistry
General organic chemistryDescribe what happens to a cell in a hypotonic solution versus a hypertonic solution.
Determine if the solutions below are isotonic, hypertonic, or hypotonic:
a) 2% NaCl
b) 2% Sugar
c) 0.5 % NaCl
d) 7% Sugar
e) 0.9% NaCl
f) 0.9% Sugar
g) 5% Sugar
h)5% NaCl
Organic Chemistry
General organic chemistryWhich of the following is the correct verbal description of Avogadro's Law?
Select the correct answer below:
Equal volumes of all gases, measured under the same conditions of
temperature and pressure, contain the same number of molecules.
Equal volumes of all gases, regardless of the conditions of temperature and
pressure, contain the same number of molecules.
Equal volumes of all gases, measured under the same conditions of
temperature and pressure, have the same mass.
Equal volumes of all gases, regardless of the conditions of temperature an
pressure, have the same mass.
Organic Chemistry
General organic chemistryWhich of the following is the correct relationship between pressure and moles of gas,
according to the kinetic molecular theory, at constant temperature and volume?
Select the correct answer below:
They don't depend on each other.
They can be both directly and inversely proportional to each other
depending on the circumstances.
They are directly proportional.
They are inversely proportional.
Organic Chemistry
General organic chemistrySuppose a solution is dilute. What can be said of this solution?
Select the correct answer below:
The solution is supersaturated.
The solution is not supersaturated.
The solute is insoluble.
None of the above
Organic Chemistry
General organic chemistryWhat is the molarity of an acetic acid (CH3COOH) if 21.5 mL of 0.46 M NaOH are needed to neutralize
24.0 mL of the sample?
Organic Chemistry
General organic chemistryWhat are adhesive forces?
Select the correct answer below:
Intermolecular forces between identical molecules of a substance
Intermolecular forces of attraction between two different molecules
Covalent bonds holding an individual molecule together
Repulsive interactions that keep molecules apart
Organic Chemistry
General organic chemistryWhich acid, A or B, is stronger in each part?
a. Acid A dissociates to a greater extent in water than acid B.
(select)
b. Acid A has a smaller K, than acid B.
(select)
c. The conjugate base of acid A is stronger than the conjugate base of acid B.
(select)
Organic Chemistry
General organic chemistryWhat is true about hydrogen bonding?
Select the correct answer below:
It is a covalent bond.
It is weaker than dispersion forces.
It is stronger than typical dipole-dipole attractions.
It only occurs in water.
Organic Chemistry
General organic chemistryHow many milliliters of 3.9 M NaOH are needed to neutralize 5.4 mL of a 3.6 M H₂SO, solution?
mL NaOH solution
Organic Chemistry
General organic chemistryCalculate the pH of each aqueous solution: (a) 0.0000071 M HCl; (b) 0.068 M KOH.
Organic Chemistry
General organic chemistryCarbon is able to form large numbers of organic compounds because carbon can
form 4 bonds
form single, double and triple bonds
form chains, rings, spheres and sheets
the carbon-carbon bond is very stable
all of the above
Organic Chemistry
General organic chemistryConsider a buffer prepared from the weak acid HNO₂ and its conjugate base NO₂-. What happens to
the concentrations of HNO₂ and NO₂- when a small amount of base is added to the buffer?
HNO₂(aq) + H₂O(l) NO₂- (aq) + H30+ (aq)
The concentration of HNO₂ (select)
and the concentration of NO₂-(select)
Organic Chemistry
General organic chemistryWhich of the following exhibits the weakest dispersion force?
Select the correct answer below:
molecules that are smaller
molecules that are larger
molecules that are electrostatic
none of the above
Organic Chemistry
General organic chemistryWhat is the molarity of an HCI solution if 20.0 mL of 0.43 M NaOH are needed to neutralize 23.0 mL of
the sample?
Organic Chemistry
General organic chemistryWhich is NOT an example of the surface tension of water?
Select the correct answer below:
Water spilled on a countertop will bead up.
Some insects can stride across the surface of ponds.
A paperclip will float on the surface of water.
An anchor sinks to the ocean floor.
Organic Chemistry
General organic chemistryBe sure to answer all parts.
Calculate the value of [H3O+] from the given [OH] in each solution and label the solution as acidic
or basic:
(a) [OH]=7.4 x 10-10 M; (b) [OH]=7.3 x 10¹ M.
Organic Chemistry
General organic chemistryIf HCOOH is a stronger acid than CH3COOH, which compound forms the stronger conjugate base?
Organic Chemistry
General organic chemistryWater will generate the strongest adhesive forces
with a surface that is able to:
Select the correct answer below:
participate in dispersion forces
generate hydrogen bonds
bend significantly
expand with heat
Organic Chemistry
General organic chemistryThe acid in acid rain is generally sulfuric acid (H₂SO4). When this rainwater falls on statues composed
of marble (CaCO3), the H₂SO4 slowly dissolves the CaCO3. Write a balanced equation for this acid-
base reaction. (Include the phase of the substances.)
Organic Chemistry
Biomolecules28. (a) If 175.00 g of CO2 (in the photosynthesis reaction below) react, then how
many grams of glucose (C6H1206) are produced?
6 CO2 + 6 H₂O → C6H12O6 + 6 02
(a) If 110.50 g of glucose were isolated, then what is the percent yield?
Organic Chemistry
General organic chemistryLike H₂O, HCO3- is amphoteric. (a) Give the formula for the conjugate acid of HCO3-. (b) Give the
formula for the conjugate base of HCO3-.
(a)
(b)
Organic Chemistry
General organic chemistrySome liquid antacids contain suspensions of aluminum hydroxide [Al(OH)3]. Write a balanced equation
for the reaction of Al(OH)3 with the HCI in stomach acid.
(Include the phase of each substance.)