Organic Chemistry Questions
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Organic Chemistry
General organic chemistryA metal block of iron with a mass of 9.10 g is at 73.6° C. It is added to 99.3 g of water at 13.9 °C. What is the final temperature of the block and the water? The specific heat of iron is 0.450 J/gº c.
Organic Chemistry
BiomoleculesName the nucleotide dAMP with its complete name.
Express your answer as an alphanumeric string. For example, ATP is named as adenosine-5'-triphosphate.
Organic Chemistry
General organic chemistryIn each of the following groups, which element is least reactive? (Consider Periods 1-6.)
(Express your answer as a chemical symbol.)
a. Group 1:
b. Group 7:
c. Group 2:
d. Group 6:
Organic Chemistry
Practical DetectionA nurse decides to move from England to India. The nurse currently makes 46,800 Euros as their annual salary. How much is this salary in Indian Rupees every month?
The conversion factor you will need is: 1 Euro = 95.12 Indian Rupees
The nurse's salary will be Indian Rupees per month.
Organic Chemistry
General organic chemistryUsing the symbol of the previous noble gas to indicate the core electrons, write the electron configuration for each of the following elements.
a. selenium, Z = 34.
b. titanium, Z= 22.
c. rubidium, Z = 37.
Organic Chemistry
Practical DetectionGiven the following balanced equation, determine how many moles of O2 are needed to completely react with 8 moles of K: 4K+0₂ > 2K₂0
4.0 moles
1.0 moles
2.0 moles
3.0 moles
Organic Chemistry
Chemistry in Daily LifeWith respect to deoxyribonucleotide metabolism,
dATP inactivates NDPK
ATP activates ribonucleotide reductase (RNR)
dADP inhibits synthesis of dATP
all of the above are true
none of the above are true
Organic Chemistry
General organic chemistryUsing the chemical formula CaO + 2 NaCl Na2O +CaCl2, calculate how many moles of CaCl2 you would produce if you used up 5.4 moles of
CaO?
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Organic Chemistry
Practical DetectionA 0.515 g sample of steam at 103.2 "C is condensed into a container with 4.97 g of water at 15.5 °C. What is the final temperature of the water mixture if no heat is lost? The specific heat of water is 4.18, the specific heat of steam is 2.01, and A Hvap = 40.7 kJ/mol.
T₁ =
Organic Chemistry
Practical DetectionIn the month of August, your electric bill was $145.68. What is the hourly cost of electricity in your home? The hourly cost for August was cents per hour. (Round to 5 decimal places) I
Organic Chemistry
PolymersWhich statement concerning proteins is not correct?
A) Proteins are long, usually folded, chains.
B) The shape of a protein molecule determines its function.
C) Proteins can be broken down and used for energy.
D) Proteins are bonded together, resulting in simple sugars.
Organic Chemistry
IsomerismIron(II) sulfate forms several hydrates with the general formula FeSO4 xH₂O, where x is an integer. If the hydrate is heated, the water can be driven off,
leaving pure FeSO4 behind.
Suppose a sample of a certain hydrate is heated until all the water is removed, and it's found that the mass of the sample decreases by 11.%. Which hydrate is
it? That is, what is x?
Organic Chemistry
BiomoleculesWith respect to breakdown of fat to the two categories of molecules it contains,
lipases are essential
fatty acids are released
it does not require oxygen, NAD, or FAD
all of the above are true
none of the above are true
Organic Chemistry
General organic chemistryCalculate Volume/volume% of a solution made by dissolving 50 ml Ethanol in 250 ml H₂ (1 point formula, 1 pt units, 0.5 pt answer)
Organic Chemistry
General organic chemistrySelect all examples where the Law of Conservation of Mass is not being followed.
2 NaCl + MgBr2 → 2 NaBr + MgCl2
H₂SO4 + 2 NaOH → Na₂SO4 + 2 H₂O
S8(g) + Ag(s)→ 8 AgS
Mg3N2(s) + 3 H₂O(1)→ NH3(g) + 3 Mg(OH)2(s)
Organic Chemistry
General organic chemistryIf the balanced chemical reaction for the formation of Li₂O is 4 Li(s) + O2(g) → 2 Li₂O(s), how many molecules of Li₂O(s) would you produce if you used
up 6 atoms of Li(s)?
6
12
2
3
Organic Chemistry
IsomerismThe Ostwald process is used commercially to produce nitric acid, which is, in turn, used in many modern chemical processes. In the first step of the Ostwald process, ammonia is reacted with oxygen gas to produce nitric oxide and water.
What is the maximum mass of H₂O that can be produced by combining 54.4 g of each reactant?
4 NH, (g) + 50₂(g) 4 NO(g) + 6H₂O(g)
mass:
-
g H₂O
Organic Chemistry
HydrocarbonsWrite the structural formula for the product that forms when 1-methylcyclopentene reacts with Br₂ in H₂O. Include stereochemistry in your answer. Draw only one enantiomer.
Note: All structures should be drawn with no bonds between carbon and hydrogen.
Organic Chemistry
General organic chemistryPlace the atoms and/or ions in order increasing atomic radius, electronegativity, effective nuclear charge, electron affinity and first ionization energy.
a. Na, Si Cl
Atomic radius:
Electronegativity:
Effective nuclear charge:
Electron affinity:
First ionization energy:
Organic Chemistry
BiomoleculesWhich set of quantum numbers is impossible?
2, 1, 0, -1/2
2, 1,-1, +1/2
3, 0, 0, +1/2
3, 0, -1, -1/2
More than one of these is impossible.
Organic Chemistry
General organic chemistryWhat is the frequency of light having a wavelength of 152 nm? (b) What is the wavelength (in
meters) of radiation having a frequency of 10.18 × 107 Hz? (This is the type of radiation used by FM
radio stations.)
(a) Frequency of light:
(Enter your answer in scientific notation)
(b) Wavelength of radiation:
Organic Chemistry
General organic chemistryThe atomic radius of metal X is 1.30 x 10² picometers (pm) and a crystal of metal X has a unit cell that is face-centered cubic. Calculate the density of metal X (atomic weight = 42.3 g/mol).
Organic Chemistry
General organic chemistryWhy might Jeff and other scientists be working on making electricity from renewable sources, like solar energy?
A because it is much more expensive to make electricity from non-renewable
sources than to make it from renewable ones
B because the sources used most are running out very quickly, and
renewable sources will not run out any time soon
C because renewable sources can burn more easily, which means we can
produce more steam to power more machines
D because using energy from renewable sources is a "wild and crazy idea",
and scientists prefer to work on very creative projects
Organic Chemistry
General organic chemistryAtomic Structure 2: Electronic Structure:Question 6
Read the statement.
lodine is on group 17 of the periodic table.
Which option describes how iodine most commonly behaves when forming ions?
It loses 1 electron.
It loses 2 electrons.
It gains 2 electrons.
It gains 1 electron.
Organic Chemistry
General organic chemistryA gas occupies 18.7 L at 2.00 atm pressure and 27°C. How many moles of gas are present in the sample
a 3.92 mol
b. 3.02 mol
c. 16.9 mol
d. 0.760 mol
e. 1.52 mol
Organic Chemistry
Chemistry in Daily LifeAn unknown compound has the following chemical formula:
PxCl5
where x stands for a whole number.
Measurements also show that a certain sample of the unknown compound contains 5.5 mol of phosphorus and 27.56 mol of chlorine.
Write the complete chemical formula for the unknown compound.
Organic Chemistry
General organic chemistryAn excess of Al and 2.3 mol of Br2 are reacted according to the equation
2A1+ 3Br2 → 2AlBr3
How many moles of AlBr3 will be formed assuming 100% yield?
a. 3.5 mol
b. 2.3 mol
c. 1.2 mol
d. 1.5 mol
e. 0.8 mol
Organic Chemistry
General organic chemistryFor the following reaction, determine the equilibrium constant at 700 °C if at this temperature.
The equilibrium concentrations are as follows: [H₂] = 0.28 M, [S2] = 1.13 x 10-6M, [H2S] = 0.75 M
2H2(g) + S2(g) → 2H2S(g)
A. 1.78 x 106
B. 8.47 x106
C. 6.35 x 106
D. 1.08 x 107
E. 3.22 x106
Organic Chemistry
General organic chemistryThe balanced equation P4(s) + 6H₂(g) → 4PH3(g) tells us that 7.0 mol H₂
a reacts with 3.5 mol P4
b. cannot react with phosphorus
c. reacts with 7.0 mol P4
d. produces 4.7 mol PH3
e produces 14.0 mol PH3
Organic Chemistry
General organic chemistryA 10.03g sample of high fructose corn syrup concentrates is burned in a bomb calorimeter containing 200.0 g H₂O. The temperature of the water increased by 15.53°C. If the molar mass of this nutrient substance is 198.17 g/mol, what is the fuel value (in nutritional Cal/g)?
[1Cal = 1000 cal = 1 kcal; Specific heat of water = 1.00 cal/(g*°C)]
A. 0.159 Cal/g
B. 0.310 Cal/g
C. 3.11 Cal/g
D.3.08 Cal/g
E. 0.786 Cal/g
Organic Chemistry
Practical DetectionMatch each orbital with a description of its general shape.
d orbitals
s orbitals
f orbitals
p orbitals
a. dumbbell shaped
b. clover shaped
c. spherical
d. none of these
Organic Chemistry
General organic chemistryWhat major assumption (that was analogous to what had already been demonstrated for electromagnetic radiation) did de Broglie and Schrödinger make about the motion of tiny particles?
A tiny particle, such as an electron, behaves as a discrete particle.
A tiny particle, such as an electron, behaves as a wave.
A tiny particle, such as an electron, behaves simultaneously as a wave and as a discrete particle.
Organic Chemistry
Chemistry in Daily LifeIn 1913, Niels Bohr proposed that electrons revolve around the nucleus of an atom in discrete orbits, each orbit corresponding to a certain specific level of energy. Which one of the following statements is a consequence of this model?
When an electron absorbs energy, it moves
a higher orbit, and when it moves to a lower orbit, it emits energy.
Electrons are able to move from one orbit to another within the same atom without any gain or loss of energy.
The atomic emission spectrum for hydrogen has only one line in the visible region.
When an electron emits energy, it moves to a higher orbit, and when it moves to a lower orbit, it absorbs energy.
A maximum of only two electrons may simultaneously occupy any orbit.
Organic Chemistry
General organic chemistryRank the types of electromagnetic radiation from
least energy to highest.
_ gamma
_ visible light
_ ultraviolet
_ infared
_ radio
_ microwave
_ x-ray
Organic Chemistry
General organic chemistryWhat is the frequency (in reciprocal seconds) of electromagnetic radiation with a wavelength of
1.41 cm?
Enter your answer in scientific notation.
Organic Chemistry
General organic chemistryTo which element does each of the following electron configurations correspond?
a.[Ne]3s²3p4
b.[Ar]4s²
c. [Ar]48²3d¹04p¹
Organic Chemistry
General organic chemistryWhat is the maximum number of electrons possible with n = 4 in an atom?
Organic Chemistry
General organic chemistryWhat angular momentum (1) quantum number
indicates an orbital that has a clover shape.
3
1
2
4
0
Organic Chemistry
Practical DetectionWhich of the following correctly summarizes the
Hund's Rule?
Matter can neither be created nor destroyed.
It only changes form during chemical
reactions.
It is fundamentally impossible to know both
the location and velocity of an electron at the
same time.
Each electron within an atom will have its
own unique set of four quantum numbers.
Electrons orbiting an atom fill the lowest
available energy levels prior to filling higher
energy orbitals.
The ground state or lowest energy state of an
atom is the one that contains the maximum
number of unpaired electrons.
Organic Chemistry
Practical DetectionWhat are the sublevels of the 3rd energy level (n=3)?
3s, 3d, 3f
3s, 3p, 3d
3s, 3p, 3f
3p, 3d, 3f
3s, 3p, 3d, 3f
Organic Chemistry
General organic chemistryHow much more energy per photon is there in green light of wavelength 526 nm than in red light of
wavelength 631 nm?
(Enter your answer in scientific notation.)
Organic Chemistry
General organic chemistryIdentify the following three elements.
(Capitalization counts!)
An excited state of this element has the electron configuration 1s²2s²2p 3s¹.
The ground-state electron configuration is [Kr]5s²4d¹05p².
The ground-state electron configuration is [Ar]4s²3d¹04p².
Organic Chemistry
General organic chemistryEnter your answer in the provided box.
The retina of a human eye can detect light when radiant energy incident on it is at least 4.0 × 10¯17 J.
For light of 565-nm wavelength, how many photons does this energy correspond to?
Organic Chemistry
General organic chemistryCompare the ionization energies of each pair of atoms. Enter the symbol for the atom with the larger ionization energy.
(If both atoms would be expected to have the same ionization energy, enter the word same.)
Pairs Symbol of atom with the larger ionization energy
H and Li
C and N
Na and K
Organic Chemistry
Practical DetectionWhich of the following correctly summarizes the Aufbau Principle?
Each electron within an atom will have its own unique set of four quantum numbers.
Matter can neither be created nor destroyed. It only changes form during chemical reactions.
It is fundamentally impossible to know both the location and velocity of an electron at the same time.
The ground state or lowest energy state of an atom is the one that contains the maximum number of unpaired electrons.
Electrons orbiting an atom fill the lowest available energy levels prior to filling higher energy orbitals.
Organic Chemistry
Practical DetectionA chemist adds 210.0 mL of a 2.68 × 10-5M zinc oxalate (ZnC₂04) solution to a reaction flask. Calculate the micromoles of zinc oxalate the chemist has added to the flask. Round your answer to 3 significant digits.
Organic Chemistry
General organic chemistryGive the electron configurations for the following atoms. Do not use the noble gas notation. Write out the complete electron configuration.
Example: Mg 1s²2s22p63s²
Element Electron configuration
P
S
He
B
Li
Organic Chemistry
General organic chemistryCompare the atomic sizes of each pair of atoms. Enter the symbol for the larger atom of each pair.
(If both atoms are the same size, enter the word same.)
Pairs Symbol for larger atom
H and Li
C and N
He and Kr
Organic Chemistry
General organic chemistryConsider the following reaction for the combustion of octane, Cs H18:
2C8H18(l) +25O2 (g) → 16CO₂(g) + 18H₂O(l)
What volume of oxygen gas at STP would be needed for the complete combustion of 13.9 g of octane?