Organic Chemistry Questions

Q1. What will be the correct R/S designation of the following molecule? (5 pts) Q2. What is the relationship of the following pairs of compounds? (5 pts) (A) Enantiomers (B) Conformational (C) Diastereomers (D) Meso

Which of the following pairs can be used to illustrate the law of multiple proportions? CO and CaCO3 H₂SO4 and H₂S KCl and KClO₂ H₂O and C12H22O11 SO and SO₂

Which of the following has a different value on the moon compared to earth? Moles Mass Weight Time

Which of the following statements is FALSE? Silicon is a metalloid Germanium is a metal Hydrogen is a non-metal Gold is malleable Sulfur does not conduct electricity

The so-called Zoot Suit Riots in Los Angeles in 1943 were a result of Oracial tensions related to the huge influx of laborers from Mexico. the enforced rationing of consumer goods. opposition to policies requiring racial segregation of factory workers. the establishment of internment camps for resident aliens.

Your death will come to you, and never You shall be, else, a slave of life, Just waiting for a dawn's favor, From nights of poverty and strife. She'll build with you a common law, One will of the Eternal Reign. And you are not condemned to slow And everlasting deadly pain. Despair Relationships Death Hate

Give the symbol for each element. a. arsenic, an element used in especially potent poisons b. zirconium, a component in some abrasives such as sandpaper c. rhenium, a metal used as filaments in mass spectrographs and in ion gauges d. potassium, an essential mineral micronutrient in human nutrition

Glucose (C6H₁2O6) in the body undergoes a process called glycolysis that produces two pyruvate (C₂H₂O3) molecules via the following equation. stilillim 19q aming 1. A Snickers bar contains 20 grams of sugar, which we will assume is glucose for the purposes of this question. After it goes through glycolysis, how many grams of pyruvate will be produced in the body?

Aqueous hydrobromic acid (HBr) will react with solid sodium hydroxide (NaOH) to produce aqueous sodium bromide (NaBr) and liquid water (H₂O). Suppose 4.05 g of hydrobromic acid is mixed with 2.7 g of sodium hydroxide. Calculate the maximum mass of water that could be produced by the chemical reaction. Round your answer to 3 significant digits.

For the following elements, draw Lewis dot diagrams, arrows to show the transfer of electrons and charges. Then, write the chemical formula and name for the compound. (3 points each) sodium and phosphorus

The Presence of Love by Samuel Taylor Coleridge And in Life's noisiest hour, There whispers still the ceaseless Love of Thee, The heart's Self-solace and soliloquy. You mould my Hopes, you fashion me within; And to the leading Love-throb in the Heart Thro' all my Being, thro' my pulse's beat; You lie in all my many Thoughts, like Light, Like the fair light of Dawn, or summer Eve On rippling Stream, or cloud-reflecting Lake. And looking to the Heaven, that bends above you, How oft! I bless the Lot that made me love. Friendship Relationships Love Revenge

Which ONE of the following enzymes will be inhibited following the downstream signalling initiated by epinephrine? Glycogen synthase Phosphoglucomutase Glycogen phosphorylase Phosphofructokinase 1

Which ONE of the following statements is CORRECT regarding the Pyruvate Dehydrogenase Complex (PDC)? The pyruvate dehydrogenase subunit can be phosphorylated. Pyruvate is reduced to Acetyl CoA. Enzymatic activity can be stimulated by pyruvate. It catalyzes an endergonic reaction.

Identify the highlighted element in the periodic table and give its [1] element name and symbol; [2] group number; [3] period; [4] classification (i.e., main group element, transition metal, or inner transition metal). [1] Element name (symbol) [2] Group number (select) [3] Period [4] Classification (select)

Which Lewis symbol for an ion is incorrect? Multiple Choice Na Ca2+ Sn4+

195.0 liters of a gas in a flexible-walled container are prepared at 718.0 mmHg and 243.0 °C. The gas is placed into a tank under high pressure. When the tank cools to 19.0 °C, the pressure of the gas is 34.0 atm. What is the volume of the gas?

How old is a piece of cotton cloth if the half-life of carbon-14 is 5,730 years, and the carbon-14 composition of the cloth is 22 percent that of living plants? A) 1,813 years B) 12,517 years C) 1.21 x 10-4 years ¹ D) 1.21 x 10-4 years

How do the authors use historical evidence to support their claim? Select two options. (a)They use a secondary source to show that the British secretary of war opposed involuntary servitude. (b)They use a primary source to show that a song was spreading the idea of equality across the Caribbean. (c)They use a secondary source to show that the idea of an enslaved people's revolt was groundbreaking. (d) They use a statistic to show that England had enough voters to end slavery and establish equality. (e)They use a primary source to show that some white people opposed the idea of freeing enslaved people.

A person opens a 2-liter bottle of cola at a picnic. If the cap is left off the bottle, the cola will become "flat" or lose its carbonation. Which statement below BEST summarizes why the cap must be kept tightly in place if the cola is to remain fresh? Select one: a. The cap keeps the atmospheric gases and liquid from mixing in the bottle. b. The cap keeps warm air from entering the two-liter bottle and raising the temperature of the cola solution. c. The cap keeps the pressure of the gas in the bottle at a high level preventing carbon dioxide from leavingthe solution. d. The cap prevents the liquid in the cola from evaporating.

If a botanist wants to learn about a new method of crossbreeding orange trees so she can use the technique in her own experiments, what type of source should she use? A. A primary source, because it will contain more details B. A secondary source, because it is written by a scientist C. A secondary source, because it will include more data D. A primary source, because it will be easier to read

A tire contains 1.16 moles of gas and has a volume of 5.99 L. A leak results in a deflated tire with a volume of 1.93 L. How many moles of gas remain in the tire? Assume the temperature and pressure remain constant.

Which of the following can be inferred on the commonalities between Dimmesdale and Chillingworth? (A) Dimmesdale and Chillingworth claim that Hester belongs to them (B) Dimmesdale and Chillingworth conceal their relationship with Hester and make her the sole sufferer. (C) Dimmesdale and Chillingworth revealed their guilt and proved that Hester is innocent (D) Dimmesdale and Chillingworth were ready to suffer any punishment for Hester.

If 1.28 moles of hydrogen react, how many water molecules will be produced, according to the following equation: 3H₂ + Fe₂O₃ → 2Fe + 3H₂O Select the correct answer below: (1) 7.71 X 10²⁴ (2) 1.28 x 10²⁴ (3) 7.71 x 10²³ (4) 1.28 x 10²²

Calculate the H₃O+ concentration from each pH: (a) 4; (b) 9. (a) ▭ x 10^▭M (b) ▭ x 10^▭M

After the Civil War ended, how was the North affected economically? (A)The agricultural economy suffered and declined. (B) Industry thrived and the economy soon recovered. (C)The rise in inflation bankrupted many businesses. (D)Economic uncertainty caused businesses to fail.

A 16.200 g sample contains 4.800 g F, 4.900 g H, and 6.500 g C. What is the percent composition of hydrogen in this sample?

Spontaneous reactions are driven by; a. increasing enthalpy and increasing entropy. b. decreasing enthalpy and decreasing entropy. c. increasing enthalpy and decreasing entropy. d. decreasing enthalpy and increasing entropy.

Length of Number of leaves Lamp power Percentage Number of clipping on clipping (watts) of light that oxygen reaches the bubbles plant formed in 10 minutes A 12 9 40 100% ? B 12 9 40 75% ? C 12 9 40 50% ? D 12 9 40 25% ? 7. Refer to the diagrams in Model 2 to complete the data table in model 3. 8. The column headings in Model 3 each describe a variable in the experiment. (a) What variable was purposefully changed in the experiment? (b) What variable changed as a result of changing the variable listed in part a? (c) What variable(s) in the Model 3 data table remained constant among all the trials?

Based on the periodic table, which atom would have the highest ionization energy: As, Br, K or Se? Enter the symbol for the atom with the highest ionization energy.

In the course of their desolate wanderings Oedipus and Antigone came to Colonus, a lovely spot near Athens, where the one-time Erinyes, the Furies, now the Benignant Goddesses, had a place sacred to them and therefore a refuge for suppliants. The blind old man and his daughter felt safe there, and there Oedipus died. Most unhappy in much of his life, he was happy at the end. The oracle which once had spoken terrible words to him comforted him when he was dying. Apollo promised that he, the disgraced, the homeless wanderer, would bring to the place where his grave should be a mysterious blessing from the gods. Theseus, the King of Athens, received him with all honor, and the old man died rejoicing that he was no longer hateful to men, but welcomed as a benefactor to the land that harbored him. Which statement accurately analyzes this passage from a historical perspective? (A) People who heard this story when it was first told may have believed that oracles could predict the future accurately (B) The characters in this story live in a society where everyone is equal. (C) The characters in this story are kind to one another, even when being kind turns out to be risky or frightening (D) People who heard this story when it was first told did not believe in sacred spaces.

What is the molar mass of a gas if 1.15 g of the gas has a volume of 224 mL at STP?

A. CH₃CH₂COOH + KOH → B. CH₃CH₂NH₂ + HCl →(no heat) C. CH₃CH₂CONHCH₃ + HCl + H₂0 → D. CH₃CH₂COOH + SOCl₂ → E. CH₃COONa+ CH₃NH₃Cl (room temp, no Catalyst not amide formation→ D. CH₃CH₂CH₂COCl+ (CH₃)₂NH →

Compared to saturated fatty acids, unsaturated fatty acids have A. lower melting points. B. higher melting points C. shorter carbon chains D.longer carbon chains, E. greater intermolecular attraction

Convert the following structural formulas to line-angle drawings. (CH₃)₂ CHCOCH(CH₂CH₃)CH₃ Draw the molecule on the canvas by choosing buttons from the Tools (for bonds and charges.

Complete and balance each of the equations below. Refer to Figure A in the instruction of Part-A (the activity series table) to determine if a single displacement reaction will occur. If you determine that there will be no reaction, write "NR” next to the balanced equation. Note: For this experiment only, assume that copper and lead will form +2 cations. (b) Cl₂ + NaBr(aq) →

Dilute, aqueous sulfuric acid is generally used to promote acid catalyzed hydration because: (A) these conditions have excess reactant and therefore drive the reaction towards products. (B) these conditions have excess product and therefore drive the reaction towards products. (C) these conditions remove product and therefore drive the reaction towards products. (D) these conditions remove reactant and therefore drive the reaction towards products.

Which of the following is true for a system at equilibrium? (A) The concentrations of reactants and products are equal. (B) The rate constants for the forward and reverse reactions are always equal. (C) The rate of the forward and reverse reactions are equal. (D) All the above are true.

Which of the following are examples of water releasing energy? Check all that are true. (A) condensation on a bathroom mirror after a hot shower (B) a puddle evaporating (C) a lake's surface water freezing over (D) frost on a windowpane caused by deposition (E) ice cubes melting

Which of the following are spontaneous processes? 1. Ice melting at 1atm and 298 K (assume only ice is initially present). 2. Heat flowing from a hot object to a cold object. 3. An iron bar rusting. A) 1 only B) 2 only C) 3 only D) 1 and 3 only E) 1, 2,' and 3

Two kittens are sleeping by a furnace vent. They are relying mainly on what kind of heat transfer? A. Chemical heating B. Radiation warming C. Convection heating D. Thermal conduction

Amino acids are building blocks of proteins. Which statement best describes the physical properties of the following amino acid? A) high melting points and low solubility in water B) large dipole moments and no hydrogen bonding C) high melting points and large dipole moments D) low solubility in water and small dipole moments E) small dipole moments and are hydrophobic.

How many joules of energy must be added to completely convert 24.0 g of ice at 0 °C to liquid water at 0 °C? The heat of fusion of water is 334 J/g, and the heat of vaporiztion of water is 2257 J/g.

What mass of helium gas is needed to pressurize a 99.0L tank to 193 atm at 25 ⁰C? What mass of oxygen gas would be needed to pressurize a similar tank to the same Specifications?

A chemist working on the synthesis of (+)-pilocarpine, an alkaloid used in the treatment of dry mouth and glaucoma, produced a mixture of enantiomers that gave a specific rotation [ɑ]D = +71° Based on the specific rotation of pure enantiomer, calculate the percentage content of (+) and (-) - pilocarpine in the mixture produced by the chemist.

In the reaction: CH₃COOH +CH₃OH ---> CH₃COOCH₃ + H₂O the organic product can best be identified as (A) an ester (B) a ketone (C) an organic acid (D) an alcohol

An atomic cation with a charge of +2 has the following electron configuration: 1s²2s²2p^6 3s' What is the chemical symbol for the ion? How many electrons does the ion have? How many 2s electrons are in the ion?

A student attended an event at a traditional tea room that offered sugar cubes instead of sugar packets. She added two sugar cubes to a cup of hot tea. After she finished drinking the tea, she was surprised to see two small chunks of undissolved sugar at the bottom of her cup. All the sugar dissolves in tea of the same temperature when added from a packet. Which of the following BEST explains why sugar remains undissolved from cubes but not from packets? 1. Adding a cube decreases the likelihood of stirring the tea, whereas adding a packet reminds people to stir. 2. Unlike the packet, the cube is compacted so not all sugar molecule surface areas contact the tea. 3. Unlike a the tea cup with cubes, tea with packets is served in a bigger cup that allows for more tea. 4. The temperature of the tea with cubes was lower than the one with packets.

Does a buffered or unbuffered solution show the greatest change in pH when an acid or base is added? Why?

To help farmers and gardeners, commercial fertilizers have a big three-number "NPK" label on the bag that gives the amounts of three key plant nutrients: nitrogen, phosphorus and potassium. For example, a bag of "10-10-10" fertilizer has 10% by mass nitrogen, 10% by mass potassium as potash (K,9), and 10% by mass phosphorus as phosphate (P2O5). Suppose a certain fertilizer has the following composition: INGREDIENT PERCENT BY MASS Ammonium Phosphate [(NH4)3PO4] 17% Calcium Nitrate [Ca(NO3)2] 31% Urea [(NH2)2CO] 29% Inert Ingredients 23% What should the first (nitrogen) number on the bag label be? That is, calculate the percent by mass of nitrogen in this fertilizer. Round your answer to the nearest percent.

A sample of glass was found on the prime suspect's shoe. Its mass was found to be 3.345 g and its volume was 1.50 mL. Where did this glass likely come from? Known Densities Standard auto glass 2.75 g/mL Pyrex pan found at the victim's house - 2.23 g/mL Broken window at victim's house-2.40 g/mL Broken drinking glass found at suspects house - 3.1 g/mL (a) the density of the glass found in the suspect's shoe matches the density of the broken glass found at their own home, the suspect likely stepped in glass at their own house (b) the density of the glass found in the suspect's shoe matches that of standard auto glass, the suspect likely stepped in some broken car window glass on the street (c) the density of the glass found in the suspect's shoe matches none of the known densities listed, the glass must have come from another source (d) the density of the glass found in the suspect's shoe matches the pyrex pan found at the victim's house, this is likely the source