Organic Chemistry Questions

Nicholas reveals his aunt's manipulation when he brings u.. the strawberry jam incident and concludes, "Oh, Devil, you have sold yourself!" (Saki 5). A. Passage #1 B. Passage #2 C. Passage #3 D. Passage #4

According to Hammond's postulate The more exothermic a reaction step, the earlier the transition state appears in time, and it resembles the reactants. The more endothermic a reaction step, the earlier the transition state appears in time, and it resembles the reactants. The more exothermic a reaction step, the earlier the transition state appears in time, and it resembles the products. The less exothermic a reaction step, the later the transition state appears in time, and it resembles the reactants.

Which description below is accurate about event during the initiation step for free-radical halogenation of alkanes? During the initiation step, the C-H bond in some alkane molecules is broken heterolitically, resulting from exposing the mixture of the reactants to light. During the initiation step, the bond in some halogen molecules is broken homolitically, resulting from exposing the mixture of the reactants to light. During the initiation step, the bond in some halogen molecules is broken heterolytically, resulting from exposing the mixture of the reactants to light. During the initiation step, the C-H bond in some alkane molecules is broken homolitically, resulting from exposing the mixture of the reactants to light.

In the chunked method, you ca 6 sometimes put a bit of evidence into your explanation. Which is an example of explanation that contains a bit of evidence? A. The only winner, it seems, are the wolves, who work in unison... B. The men fight over a land "where the trees can't even stand upright in a breath of wind" (Saki 5)... C. In this story, everything is ironic.

Which evidence belongs in body. paragraph #2? A. Ironically, Nicholas finds that "the older, wiser, and better people" were always in error (Saki 1). B. A humorous tone is apparent with words like "seemingly frivolous" & "quite uninteresting" (Saki 2). C. Saki uses imagery when a tapestry is "glowing in wonderful colors beneath a layer of dust" (Saki 4).

Predict the product composition for free-radical bromination of pentane by stating the percentage composition of the three possible products named below: A. 1-bromopentane B. R-2-bromopentane C. S-2-bromopentane D. 3-bromopentane

The specific rotation of enantiomer A is 7.9º. A mixture of enantiomer A and A'(the enantiomer of A) is subjected to polarimetry and an observed rotation of 2.1° is obtained, what is the %Composition for this mixture? 63.3% A' and 36.7% A 63.3% A and 36.7% A' 50% A and 50% A' 30% A' and 70% A

10 Nicholas' aunt calls out to him in desperation, "I've been looking for you in the gooseberry garde and I've slipped into the rain- water tank ... the sides are slippery and I can't get out" in hopes of procuring his assistance (Saki 4). A. Passage #1 B. Passage #2 C. Passage #3 D. Passage #4

Which of the following lists the relative strengths of the fundamental forces from strongest to weakest? A. Strong nuclear force, weak nuclear force, gravitational force, electrostatic force B. Gravitational force, strong nuclear force, electrostatic force, weak nuclear force C. Electrostatic force, gravitational force, weak nuclear force, strong nuclear force D. Strong nuclear force, electrostatic force, weak nuclear force, gravitational force

From the topic sentence in the 5 sample paragraph, Saki's use or which literary device or technique is being addressed? A. characterization B. irony C. dialogue

Using the alternating method, 7 where does the following explanation belong in the outline of Body Paragraph 2? The wolves symbolize both the power of nature and its disregard for men or their concerns. A. Explanation 1 B. Explanation 2 C. Explanation 3

What is one advantage of using fossil fuels? A. They are more reliable than other sources of energy. B. They produce fewer pollutants than other fuels. C. There is an unlimited supply of fossil fuels. D. They are relatively inexpensive.

From the sample conclusion paragraph, which passage is a Paraphrase of the text/story? A. In "The Lady, or the Tiger" Stockton B. The story is about a princess who must choose whether she would prefer to see her lover die... C. It is clear that Stockton uses symbolism throughout the story; the tiger represents jealousy... D. Stockton...thematically suggests that love never ends well no matter what the circumstances

Which of the following DNA duplex will melt at higher temperature? A) GGGAAATTT CCCTTTAAA B) GGGGGGTTT CCCGGGAAA A and B will not melt at all. A and B will melt at same temperature A will melt at higher temperature B will melt at higher temperature

If one pure enantiomer rotates the plane-polarized light 117.6° in the clockwise direction, then a pure sample of its non-superimposable mirror image will rotate it -117.6 -62.4 62,4 117.6

The specific rotation of enantiomer A is -87.3º. A mixture of enantiomer A and A'(the enantiomer of A) is subjected to polarimetry and an observed rotation of 34.2° is obtained, what is the %EE for this mixture? 39.2% A 60.8% A 39.2% A' 60.8% A

Calculate the number of oxygen atoms in a 120.0 g sample of forsterite (Mg2SiO4). Be sure your answer has a unit symbol if necessary, and round it to 4 significant digits.

A dextrorotatory enantiomer Is also of R configuration. Is also of S configuration. Rotates the propagation plane of polarized light in clockwise fashion. Is also of- configuration.

Select the correct answer. How does a catalyst speed up a chemical reaction? A. by lowering the activation energy B. by lowering the AH of the reaction C. by raising the energy of the products D. by raising the energy of the reactants

Question 8 of 25 What can be said about a reaction with AH= 620 kJ/mol and AS = -0.46 kJ/(mol-K)? A. It is never spontaneous. B. It is always spontaneous. C. It is spontaneous above 1347 K. D. It is spontaneous at 298 K.

What information does the latent heat of vaporization give? A. The energy needed to completely vaporize a mole of a liquid B. The energy needed to heat a liquid from freezing point to boiling point C. The energy needed to raise the temperature of 1 g of a vapor 1°C D. The energy needed to completely melt a mole of a solid

According to the following balanced chemical reaction: 2 Cr(s) + 2 H3PO4 (aq) + 3 H₂ (g) + 2 CrPO4 - What mass (in grams) of H₂ Las is produced when 48.3 grams of phosphoric acid are reacted with excess chromium?

What makes ocean breezes blow toward land by day? A. The ocean water has more currents in it. B. The ocean warms more slowly than the land. C. The ocean warms more quickly than the land. D. The ocean waves create the breezes.

A rocket is designed to drop its first stage mid-flight. Due to a malfunction, this does not occur. What is a possible result of this malfunction? A. The rocket is now too heavy to reach its destination. B. Rocket stages will drop. C. Thrust will increase. D. The specific impulse will increase.

How many grams of lead(II) chloride is produced if 13.87 g lead(II) nitrate combines with excess hydrochloric acid to produce lead(II) chloride and nitric acid? Pb(NO3)2 + HCI -> PbCl2 + HNO3 [unbalanced] 11.64 g 14.33 g 0.086 g 16.52 g 5.82 g

Which statement is true about how scientists draw conclusions from data? A. Scientists do not allow others to make conclusions about their data. B. Two scientists may have different underlying assumptions that lead them to different conclusions about the same data. C. Any two scientists will always come to the same conclusion about a data set. D. Teams of scientists never share their data to help other teams draw conclusions.

Why do your feet burn when you walk across beach sand on a sunny summer day? A. Heat is transferred by radiation warming. B. Heat is transferred by frictional heating. C. Heat is transferred by thermal conduction. D. Heat is transferred by convection heating.

Two scientists come to different conclusions about an experiment. What should be done to settle their disagreement? A. One of the scientists should change his or her conclusion. B. They should have a debate. C. More experiments should be performed. D. People should assume the older scientist is correct.

Which of the following is a primary source? A. An encyclopedia entry B. A scientific paper C. A magazine article D. A news report on the Internet

The combustion reactions that occur in the engines of a rocket lead to pressure gradients that cause the gaseous products to rush out of the rocket into the atmosphere. What is created by this process? A. Thermodynamics B. Fuel efficiency C. Thrust D. Decreasing entropy

How does a scientist critique another scientist's conclusions? A. By ignoring the first scientist's data B. By performing more experiments C. By criticizing the scientist's personal beliefs D. By reading secondary sources

You read a primary source and a secondary source that discuss the same experiment. There is a difference in the conclusions made by these two sources. Which should you trust more, and why? A. The primary source, because it was written by the researcher B. The primary source, because it contains more charts C. The secondary source, because it is easier to understand D. The secondary source, because it was printed on paper

People breathe in oxygen molecules from the air and exhale carbon dioxide molecules. Because of this, the air is full of carbon dioxide and oxygen mixed together. What is this an example of? A. An increase in entropy B. An increase in oxidation reactions C. An increase in enthalpy D. An increase in evaporation

How does the phase of water affect its specific heat capacity? A. Water vapor has the highest specific heat capacity. B. All phases have the same specific heat capacity. C. Frozen water has the highest specific heat capacity. D. Liquid water has the highest specific heat capacity.

For which of the reactions listed below will Gibbs free energy always be positive? A. An endothermic reaction that increases in entropy B. An exothermic reaction that decreases in entropy C. An exothermic reaction that increases in entropy D. An endothermic reaction that decreases in entropy

Which statement describes the potential energy diagram of an exothermic reaction? A. The potential energy of the products is greater than the potential energy of the reactants. B. The activation energy of the reactants is greater than the activation energy of the products. C. The potential energy of the reactants is greater than the potential energy of the products. D. The potential energy of the products is equal to the potential energy of the reactants.

A chemist must prepare 500. mL of 445. mM aqueous aluminum sulfate (Al₂(SO4)₂) working solution. He'll do this by pouring out some 0.975 M aqueous aluminum sulfate stock solution into a graduated cylinder and diluting it with distilled water. Calculate the volume in mL of the aluminum sulfate stock solution that the chemist should pour out. Be sure your answer has the correct number of significant digits. ?

What causes radiation heating? A. Heat transfer through electromagnetic waves B. Heat transfer through differences in temperatures C. Heat transfer through moving gases or liquids D. Heat transfer through contact between molecules

Draw the condensed structure of 1,2,5-pentanetriol.

What volume (in L) of ethane (C₂H6) will be required to produce 42.5L of carbon dioxide in the reaction below? 2C₂H6(g) +702(g) → 4CO2(g) + 6H₂O(g)

Identify the components of the ionic formula based on the name nickel(III) sulfide. What is the symbol for the element that forms the positive cation?__ What is the symbol for the element that forms the negative anion?__ What is the subscript on the cation in the neutral formula?__ What is the subscript on the anion in the neutral formula?__

Which of the following shows that the combustion of methane produces 802 kJ/mol of energy? A. CH4(g) + 20₂(g) → CO₂(g) + 2H₂O(g) + 802 kJ/mol B. CH4(g) + 20₂(g) → CO₂(g) + 2H₂O(g) - 802 kJ/mol C. CH4(g) +202(g) + 802 kJ/mol → CO₂(g) + 2H₂O(g) D. CH₂(g) +20₂(g) → CO₂(g) + 2H₂O(g)

Draw the skeletal ("line") structure of 2-chlorobutanoic acid.

Calculate the number of carbon atoms in a 140.0 g sample of camphor (C₁0H160). Be sure your answer has a unit symbol if necessary, and round it to 4 significant digits.

A chemist prepares a solution of barium acetate (Ba(C₂H₂O₂)₂) by measuring out 100. g of barium acetate into a 250. mL volumetric flask and filling the flask to the mark with water. Calculate the concentration in mol/L of the chemist's barium acetate solution. Be sure your answer has the correct number of significant digits.

Dilution A chemist must prepare 725. mL of 5.00 mM aqueous barium chlorate (Ba(ClO3)₂) working solution. She'll do this by pouring out some 49.9 mM aqueous barium chlorate stock solution into a graduated cylinder and diluting it with distilled water. Calculate the volume in mL of the barium chlorate stock solution that the chemist should pour out. Be sure your answer has the correct number of significant digits.

Determine whether each equation is balanced as written. CH4 + O₂ CO₂ + H₂O Choose... 2 HCl + Mg(OH)2 → 2 H₂O + MgCl₂ Choose... H₂ + O₂ → 2 H₂O Choose... AgNO3 + NaCl → C6H12O6 +02 Mg + H₂SO4 → MgSO4+H₂ Choose... NaNO3 + AgCl Choose... 6CO₂ + 6H₂O Choose...

According to the following balanced chemical reaction: CH4(g) + 2 O₂(g) - CO₂(g) + 2 H₂O(l) 4 What mass (in grams) of CO₂ is produced when 56.5 grams of oxygen are reacted with excess CH4? Your Answer: Answer units

Draw the condensed structure of a 3° amine with 4 carbon atoms, and no double or triple bonds.

Question 3 of 10 Which of these statements about airplane and rocket flight is true? A. Only one requires combustion reactions to generate thrust. B. Only one must overcome the force of gravity. C. Only one requires both fuel and an oxidizer for the combustic reaction. D. Only one requires air molecules to generate lift.