Organic Chemistry Questions

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Which of the following is a FALSE statement?
a. Pressure is created by collisions between gas particles and the walls of container.
b. Atmospheric pressure is lower at higher altitudes.
C. A barometer is a device used to measure atmospheric pressure.
d. Standard temperature and pressure is 0 °C and 1 atm.
e. A small amount of the volume occupied by a gas is empty space.
Organic Chemistry
General organic chemistry
Which of the following is a FALSE statement? a. Pressure is created by collisions between gas particles and the walls of container. b. Atmospheric pressure is lower at higher altitudes. C. A barometer is a device used to measure atmospheric pressure. d. Standard temperature and pressure is 0 °C and 1 atm. e. A small amount of the volume occupied by a gas is empty space.
What is the IUPAC name of this compound?
A) butanamide
B) N-methylbutanamide
C) N-dimethylbutanamide
D) N,N-dimethylbutanamide
E) dimethylbutanamide
Organic Chemistry
General organic chemistry
What is the IUPAC name of this compound? A) butanamide B) N-methylbutanamide C) N-dimethylbutanamide D) N,N-dimethylbutanamide E) dimethylbutanamide
A compound is found to contain 14.87% phosphorus and 85.13% chlorine by mass.
What is the empirical formula for this compound?
Organic Chemistry
Practical Detection
A compound is found to contain 14.87% phosphorus and 85.13% chlorine by mass. What is the empirical formula for this compound?
Complete the table below for calculating the molar mass of the compound sulfur dichloride.
Organic Chemistry
General organic chemistry
Complete the table below for calculating the molar mass of the compound sulfur dichloride.
Shown below are the spectra (labeled A and B) for the reactant and product in a
bromination reaction. One spectrum shows C3H6Br2O and the other one shows
C3H6O. Identify which spectra is which, draw the two structures for the reactant and
product and then explain which peaks in the NMR spectra correspond to the
hydrogens in the structure.
Organic Chemistry
Practical Detection
Shown below are the spectra (labeled A and B) for the reactant and product in a bromination reaction. One spectrum shows C3H6Br2O and the other one shows C3H6O. Identify which spectra is which, draw the two structures for the reactant and product and then explain which peaks in the NMR spectra correspond to the hydrogens in the structure.
How many moles are present in the 1.20-g sample of copper?
Organic Chemistry
Isomerism
How many moles are present in the 1.20-g sample of copper?
Copper (Cu) is a metal that is commonly used for electrical wiring. Determine both the number of moles of atoms and the number of atoms in a 1.20 g sample of copper.
How many Cu atoms are in the 0.0189 mol sample?
Organic Chemistry
Chemistry in Daily Life
Copper (Cu) is a metal that is commonly used for electrical wiring. Determine both the number of moles of atoms and the number of atoms in a 1.20 g sample of copper. How many Cu atoms are in the 0.0189 mol sample?
What is the empirical formula for vinegar?
Organic Chemistry
Polymers
What is the empirical formula for vinegar?
Find the oxidation numbers for each element in the following compound. Label positive values as "+X" and negative values as "-X" where X is the oxidation number you calculate.
Mg(MnO4)2
Organic Chemistry
General organic chemistry
Find the oxidation numbers for each element in the following compound. Label positive values as "+X" and negative values as "-X" where X is the oxidation number you calculate. Mg(MnO4)2
Predict the major product from the addition of HBr to the following molecules:
a) 3-methyl-1-pentene
b) 2,2-dimethyl-3-hexene
Organic Chemistry
Halogen Derivatives
Predict the major product from the addition of HBr to the following molecules: a) 3-methyl-1-pentene b) 2,2-dimethyl-3-hexene
At 473 K, the pressure of a sample of nitrogen is 1050 mmHg. What will the temperature be in
°C (assuming constant volume and amount of gas) if the pressure is decreased to 833 mmHg?
a. 102 °C
b. 324 °C-
C. 375 °C
d. 597 °C
e. 648 °C
Organic Chemistry
General organic chemistry
At 473 K, the pressure of a sample of nitrogen is 1050 mmHg. What will the temperature be in °C (assuming constant volume and amount of gas) if the pressure is decreased to 833 mmHg? a. 102 °C b. 324 °C- C. 375 °C d. 597 °C e. 648 °C
You have not correctly identified the
value of x. You know that x represents
the number of grams of sucrose. First,
calculate the number of moles of solute
in 250 mL of a 0.100 M solution. Then,
convert from moles to grams using the
molar mass of sucrose.
Organic Chemistry
General organic chemistry
You have not correctly identified the value of x. You know that x represents the number of grams of sucrose. First, calculate the number of moles of solute in 250 mL of a 0.100 M solution. Then, convert from moles to grams using the molar mass of sucrose.
If pressure increases, which of the following variables would decrease? Assume all other
variables are held constant.
a. Temperature
b. Moles
c. Volume
d. Both Moles & Volume
e. Both Temperature & Volume
Organic Chemistry
Polymers
If pressure increases, which of the following variables would decrease? Assume all other variables are held constant. a. Temperature b. Moles c. Volume d. Both Moles & Volume e. Both Temperature & Volume
Consider the following reaction:
2 Al +3 CuCl₂ →3 Cu + 2 AlCl3
Assuming 73.55 g of Al are reacted with 21.83 g of copper Il chloride, how much of the excess
reactant is left behind (unused)?
Identify the limiting reactant:
CuCl2
AI
Organic Chemistry
Chemistry in Daily Life
Consider the following reaction: 2 Al +3 CuCl₂ →3 Cu + 2 AlCl3 Assuming 73.55 g of Al are reacted with 21.83 g of copper Il chloride, how much of the excess reactant is left behind (unused)? Identify the limiting reactant: CuCl2 AI
When a 0.2481-g sample of titanium metal is reacted with oxygen, the final mass of the resulting compound is 0.4139 g. Determine the empirical formula of this titanium oxide.
HOW DO WE GET THERE?
What is the mass of each element present in the compound? (Enter your answers to four significant figures.)
Organic Chemistry
General organic chemistry
When a 0.2481-g sample of titanium metal is reacted with oxygen, the final mass of the resulting compound is 0.4139 g. Determine the empirical formula of this titanium oxide. HOW DO WE GET THERE? What is the mass of each element present in the compound? (Enter your answers to four significant figures.)
How many grams of Kr are there in a sample of Kr that contains 9.27×10^23 atoms?
Organic Chemistry
General organic chemistry
How many grams of Kr are there in a sample of Kr that contains 9.27×10^23 atoms?
An organic acid is composed of carbon (48.64%), hydrogen (8.18%), and oxygen (43.20%). Its molar mass is 74.08 g/mol. Determine the molecular formula of the compound.
Organic Chemistry
Chemistry in Daily Life
An organic acid is composed of carbon (48.64%), hydrogen (8.18%), and oxygen (43.20%). Its molar mass is 74.08 g/mol. Determine the molecular formula of the compound.
An alcohol is 62.04 % C and 10.43 % H by mass. The rest is oxygen. What is the empirical formula of the alcohol? Enter the elements in the order C, H, and then O.
Organic Chemistry
Isomerism
An alcohol is 62.04 % C and 10.43 % H by mass. The rest is oxygen. What is the empirical formula of the alcohol? Enter the elements in the order C, H, and then O.
Vinegar contains carbon, hydrogen, and oxygen with percent masses of 40.01% C, 6.70% H, and 53.29% O, respectively. Determine the empirical formula of the compound.
HOW DO WE GET THERE?
What is the mass of each element in 100.0 g of vinegar? (Enter your answers to two decimal places.)
Organic Chemistry
General organic chemistry
Vinegar contains carbon, hydrogen, and oxygen with percent masses of 40.01% C, 6.70% H, and 53.29% O, respectively. Determine the empirical formula of the compound. HOW DO WE GET THERE? What is the mass of each element in 100.0 g of vinegar? (Enter your answers to two decimal places.)
An organic acid is composed of carbon (62.04%), hydrogen (10.43%), and oxygen (27.55%). Its molar mass is 116.16 g/mol. Determine the molecular formula of the compound.
Organic Chemistry
General organic chemistry
An organic acid is composed of carbon (62.04%), hydrogen (10.43%), and oxygen (27.55%). Its molar mass is 116.16 g/mol. Determine the molecular formula of the compound.
How many grams of Si are there in a sample of Si that contains the same number of moles as a 107 gram sample of Co?
Organic Chemistry
General organic chemistry
How many grams of Si are there in a sample of Si that contains the same number of moles as a 107 gram sample of Co?
How many ATOMS of nitrogen are present in 3.94 grams of dinitrogen tetroxide ?
How many GRAMS of oxygen are present in 4.10×10²2 molecules of dinitrogen tetroxide ?
Organic Chemistry
Chemistry in Daily Life
How many ATOMS of nitrogen are present in 3.94 grams of dinitrogen tetroxide ? How many GRAMS of oxygen are present in 4.10×10²2 molecules of dinitrogen tetroxide ?
A sample of Sc weighs 96.7 grams. Will a sample of Be that contains the same number of atoms weigh more or less than 96.7 grams? 
Calculate the mass of a sample of Be that contains the same number of atoms.
Organic Chemistry
Polymers
A sample of Sc weighs 96.7 grams. Will a sample of Be that contains the same number of atoms weigh more or less than 96.7 grams? Calculate the mass of a sample of Be that contains the same number of atoms.
Synthesize the following compounds from the given starting material. You can add on
on any alkyl/ alkyl halide under 8 carbons or any necessary inorganic reagent needed (this
includes triphenyl phosphine (Ph3P). Please draw all intermediates and reagents
necessary to get to the product.
Organic Chemistry
Aldehydes & Ketones
Synthesize the following compounds from the given starting material. You can add on on any alkyl/ alkyl halide under 8 carbons or any necessary inorganic reagent needed (this includes triphenyl phosphine (Ph3P). Please draw all intermediates and reagents necessary to get to the product.
During formation of photochemical smog, methane react with ozone to form an aldehyde. How many moles of methane will be oxidized by 4 mole of ozone?
Organic Chemistry
Practical Detection
During formation of photochemical smog, methane react with ozone to form an aldehyde. How many moles of methane will be oxidized by 4 mole of ozone?
Which of the following types of map would best show the three
dimensions of Earth's surface?
road map
topographic map
weather map
tectonic map
Organic Chemistry
Chemistry in Daily Life
Which of the following types of map would best show the three dimensions of Earth's surface? road map topographic map weather map tectonic map
A compound is found to contain 55.39 % boron, 8.280 % hydrogen, and 36.33 % chlorine by mass.
What is the empirical formula for this compound?
Organic Chemistry
General organic chemistry
A compound is found to contain 55.39 % boron, 8.280 % hydrogen, and 36.33 % chlorine by mass. What is the empirical formula for this compound?
Ozone (O3) is formed in the earth's upper atmosphere by the action of solar radiation on oxygen
molecules (O2). Write a balanced equation for the formation of ozone from oxygen.
Balance the following equations:
a. Ca(OH)2+HCl-CaCl2+H2O
b. Al +O2-Al2O3
C. CH3CH3+02-CO2+H2O
d. AgNO3+MgCl2-AgCl +Mg(NO3)2
Organic Chemistry
General organic chemistry
Ozone (O3) is formed in the earth's upper atmosphere by the action of solar radiation on oxygen molecules (O2). Write a balanced equation for the formation of ozone from oxygen. Balance the following equations: a. Ca(OH)2+HCl-CaCl2+H2O b. Al +O2-Al2O3 C. CH3CH3+02-CO2+H2O d. AgNO3+MgCl2-AgCl +Mg(NO3)2
Which of the following statements is/are true?
I. a double bond is composed of two pi bonds
II. sigma bonds have electron density on the bond axis, while pi bonds always have a nodal plane along the bond axis
III. pi bonds are formed by sideways overlap of hybrid orbitals
IV. there is no rotation about a pi bond
Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer.
a none are true
b one is true
c two are true
d three are true
e all are true
Organic Chemistry
General organic chemistry
Which of the following statements is/are true? I. a double bond is composed of two pi bonds II. sigma bonds have electron density on the bond axis, while pi bonds always have a nodal plane along the bond axis III. pi bonds are formed by sideways overlap of hybrid orbitals IV. there is no rotation about a pi bond Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a none are true b one is true c two are true d three are true e all are true
Find the element phosphorus, P, on the periodic table.
a. What is the average atomic mass of phosphorus?
b. What is its atomic number?
c. Predict which isotope you would find in greatest abundance for phosphorus.
Organic Chemistry
Practical Detection
Find the element phosphorus, P, on the periodic table. a. What is the average atomic mass of phosphorus? b. What is its atomic number? c. Predict which isotope you would find in greatest abundance for phosphorus.
A compound 'P' containing Bromine in it, on treatment with
NH3 produces 'Q', which is solid at room temperature and is
free from Bromine atom. The solid Q contains 49.3% Carbon,
9.59% Hydrogen, 19.18% Nitrogen and 21.93% Oxygen. 'Q' on
reaction with Br₂ and Ca(OH)₂ gives a product 'R'. The
product 'R' can give carbylamine test and give ethene on
reaction with excess of CH3 - I followed by heating with
moist Ag₂O.
Organic Chemistry
General organic chemistry
A compound 'P' containing Bromine in it, on treatment with NH3 produces 'Q', which is solid at room temperature and is free from Bromine atom. The solid Q contains 49.3% Carbon, 9.59% Hydrogen, 19.18% Nitrogen and 21.93% Oxygen. 'Q' on reaction with Br₂ and Ca(OH)₂ gives a product 'R'. The product 'R' can give carbylamine test and give ethene on reaction with excess of CH3 - I followed by heating with moist Ag₂O.
How many ATOMS of sulfur are present in 2.76 grams of sulfur dichloride ?
How many GRAMS of chlorine are present in 9.76x1022 molecules of sulfur dichloride?
Organic Chemistry
Practical Detection
How many ATOMS of sulfur are present in 2.76 grams of sulfur dichloride ? How many GRAMS of chlorine are present in 9.76x1022 molecules of sulfur dichloride?
A solution of two diastereomers
contains 77.0% of (3S,4S)-tert-
butyl-3-amino-4-
hydroxypyrrolidine-1-carboxylate
and 23.0% of (3S,4R)-tert-butyl-3-
amino-4-hydroxypyrrolidine-1-
carboxylate. Calculate the percent
diastereomeric excess (%e.e.) of
the (3S,4S)-tert-butyl-3-amino-4-
hydroxypyrrolidine-1-carboxylate in
this solution.
Organic Chemistry
Isomerism
A solution of two diastereomers contains 77.0% of (3S,4S)-tert- butyl-3-amino-4- hydroxypyrrolidine-1-carboxylate and 23.0% of (3S,4R)-tert-butyl-3- amino-4-hydroxypyrrolidine-1- carboxylate. Calculate the percent diastereomeric excess (%e.e.) of the (3S,4S)-tert-butyl-3-amino-4- hydroxypyrrolidine-1-carboxylate in this solution.
A compound is found to contain 37.47 % carbon, 12.61 % hydrogen, and 49.92 % oxygen by mass.
To answer the question, enter the elements in the order presented above.
QUESTION 1:
The empirical formula for this compound is
QUESTION 2:
The molar mass for this compound is 32.05 g/mol.
The molecular formula for this compound is
Organic Chemistry
General organic chemistry
A compound is found to contain 37.47 % carbon, 12.61 % hydrogen, and 49.92 % oxygen by mass. To answer the question, enter the elements in the order presented above. QUESTION 1: The empirical formula for this compound is QUESTION 2: The molar mass for this compound is 32.05 g/mol. The molecular formula for this compound is
A solution of a chiral compound was
prepared by dissolving 15.67 g in
16.00 mL of solvent. The solution
was placed in a tube that is 1.00 dm
long.
What is the specific rotation of light
if the observed rotation was
determined experimentally to be
+62.41°?
Organic Chemistry
Isomerism
A solution of a chiral compound was prepared by dissolving 15.67 g in 16.00 mL of solvent. The solution was placed in a tube that is 1.00 dm long. What is the specific rotation of light if the observed rotation was determined experimentally to be +62.41°?
A compound having an approximate molar mass of 210.0-215.0 g has the following percentage composition by mass:
carbon, 33.80 %
hydrogen, 1.428 %
nitrogen, 19.72 %
oxygen, 45.07 %
Determine the empirical and molecular formulas of the compound.
(Enter the elements in the order: C, H, N, O.)
Empirical formula:
Molecular formula:
Organic Chemistry
Isomerism
A compound having an approximate molar mass of 210.0-215.0 g has the following percentage composition by mass: carbon, 33.80 % hydrogen, 1.428 % nitrogen, 19.72 % oxygen, 45.07 % Determine the empirical and molecular formulas of the compound. (Enter the elements in the order: C, H, N, O.) Empirical formula: Molecular formula:
A compound was analyzed and was found to contain the following percentages of the elements by mass: sulfur, 94.09%; hydrogen, 5.91%. Determine the empirical formula of the compound.
Empirical formula:
Organic Chemistry
General organic chemistry
A compound was analyzed and was found to contain the following percentages of the elements by mass: sulfur, 94.09%; hydrogen, 5.91%. Determine the empirical formula of the compound. Empirical formula:
A compound having an approximate molar mass of 165.0-170.0 g has the following percentage composition by mass:
carbon, 42.86 %
hydrogen, 3.598 %
nitrogen, 25.00 %
oxygen, 28.54 %
Determine the empirical and molecular formulas of the compound.
(Enter the elements in the order: C, H, N, O.)
Empirical formula: 
Molecular formula:
Organic Chemistry
General organic chemistry
A compound having an approximate molar mass of 165.0-170.0 g has the following percentage composition by mass: carbon, 42.86 % hydrogen, 3.598 % nitrogen, 25.00 % oxygen, 28.54 % Determine the empirical and molecular formulas of the compound. (Enter the elements in the order: C, H, N, O.) Empirical formula: Molecular formula:
Use the References to access important values needed for this question.
Determine the molecular and empirical formulas for the substance shown in the ball-and-stick model below.
Molecular Formula.
Empirical Formula
C = black
H = gray
Organic Chemistry
Hydrocarbons
Use the References to access important values needed for this question. Determine the molecular and empirical formulas for the substance shown in the ball-and-stick model below. Molecular Formula. Empirical Formula C = black H = gray
Using the average atomic masses for each of the following elements, calculate the number of atoms present in each of the following samples.
a. 80.16 amu of calcium
atom(s)
b. 1471.2 amu of tungsten
atom(s)
c. 164.82 amu of manganese
atom(s)
Organic Chemistry
Hydrocarbons
Using the average atomic masses for each of the following elements, calculate the number of atoms present in each of the following samples. a. 80.16 amu of calcium atom(s) b. 1471.2 amu of tungsten atom(s) c. 164.82 amu of manganese atom(s)
A compound is found to contain 26.73 % phosphorus, 12.09 % nitrogen', and 61.18 % chlorine by mass.
To answer the question, enter the elements in the order presented above.
QUESTION 1:
The empirical formula for this compound is____.
QUESTION 2:
The molar mass for this compound is 115.9 g/mol.
The molecular formula for this compound is_____.
Organic Chemistry
General organic chemistry
A compound is found to contain 26.73 % phosphorus, 12.09 % nitrogen', and 61.18 % chlorine by mass. To answer the question, enter the elements in the order presented above. QUESTION 1: The empirical formula for this compound is____. QUESTION 2: The molar mass for this compound is 115.9 g/mol. The molecular formula for this compound is_____.
One mole of H₂O and one mole of CO are taken in a 10 litre vessel and heated to 725 K. At equilibrium, 40 percent of water (by mass) reacts with carbon monoxide according to the equation: 
H₂O(g) + CO(g) ⇒ H2(g) + CO2(g)
 Calculate the equilibrium constant for the reaction.
Organic Chemistry
General organic chemistry
One mole of H₂O and one mole of CO are taken in a 10 litre vessel and heated to 725 K. At equilibrium, 40 percent of water (by mass) reacts with carbon monoxide according to the equation: H₂O(g) + CO(g) ⇒ H2(g) + CO2(g) Calculate the equilibrium constant for the reaction.
Calculate the percentage composition for SiO2.
Mass percentage of silicon =   ____%
Mass percentage of oxygen =____%
Organic Chemistry
Alcohols and Phenols
Calculate the percentage composition for SiO2. Mass percentage of silicon = ____% Mass percentage of oxygen =____%
How many Fe atoms are there in 4.67 moles of Fe?
____atoms
Organic Chemistry
Practical Detection
How many Fe atoms are there in 4.67 moles of Fe? ____atoms
A 5.746 gram sample of chromium is heated in the presence of excess fluorine. A metal fluoride is formed with a mass of 12.04 g. Determine the empirical formula of the metal fluoride  
Enter the elements in the order Cr, F 
empirical formula =
Organic Chemistry
General organic chemistry
A 5.746 gram sample of chromium is heated in the presence of excess fluorine. A metal fluoride is formed with a mass of 12.04 g. Determine the empirical formula of the metal fluoride Enter the elements in the order Cr, F empirical formula =
Enter a balanced chemical equation for the acid hydrolysis of methyl benzoate. (Use either molecular formulas or condensed structural formulas,but be consistent in your equation.) Express your answer as a chemical equation.
Organic Chemistry
General organic chemistry
Enter a balanced chemical equation for the acid hydrolysis of methyl benzoate. (Use either molecular formulas or condensed structural formulas,but be consistent in your equation.) Express your answer as a chemical equation.
A compound is found to contain 26.96 % sulfur, 13.45% oxygen, and 59.59 % chlorine by mass. What is the empirical formula for this compound?
To answer the question, enter the elements in the order presented above.
Organic Chemistry
Practical Detection
A compound is found to contain 26.96 % sulfur, 13.45% oxygen, and 59.59 % chlorine by mass. What is the empirical formula for this compound? To answer the question, enter the elements in the order presented above.
A 42.96 gram sample of cobalt is heated in the presence of excess sulfur. A metal sulfide is formed with a mass of 78.03 g. Determine the empirical formula of the metal sulfide.
Organic Chemistry
General organic chemistry
A 42.96 gram sample of cobalt is heated in the presence of excess sulfur. A metal sulfide is formed with a mass of 78.03 g. Determine the empirical formula of the metal sulfide.
Calculate the percentage composition for CBr4.
Mass percentage of carbon =
Mass percentage of bromine =
Organic Chemistry
General organic chemistry
Calculate the percentage composition for CBr4. Mass percentage of carbon = Mass percentage of bromine =
A compound having an approximate molar mass of 253.0-258.0 g has the following percentage composition by mass:
Determine the empirical and molecular formulas of the compound.
Organic Chemistry
Practical Detection
A compound having an approximate molar mass of 253.0-258.0 g has the following percentage composition by mass: Determine the empirical and molecular formulas of the compound.