General organic chemistry Questions and Answers

Water 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

The 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.)

Like 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)

Some 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.)

Ideal Gas Law Practice Problems Use the ideal gas law, PV = nRT and the universal gas law constant to solve the following problems. Remember your temperature must be in Kelvin and round your final answer to significant figures. If pressure unit is in atm, use: If pressure unit is kPa, use: R = 0.0821 L x atm / K x mol R = 8.31 kPax L K x mol 1. If I have 3 moles of a gas at pressure of 2.3 atm and a volume of 11 liters, what is the temperature? 2. If I have a gas at a pressure of 1.4 atm, a volume of 38 liters and a temperature of 84 degrees Celsius, how many moles of gas do I have?

Use the ideal gas law, PV = nRT and the universal gas law constant to solve the following problems. Remember your temperature must be in Kelvin and round your final answer to significant figures. If pressure unit is in atm, use: If pressure unit is kPa, use: R = 0.0821 L x atm /Kx mol R = 8.31 kPax L K x mol 1. If I have 3 moles of a gas at pressure of 2.3 atm and a volume of 11 liters, what is the temperature?

18.33 Draw both products that are obtained when 4-chloro-2-methyltoluene is treated with NaNH, followed by treatment with H₂O*. 18.34 Starting with benzene and using any other necessary reagents of your hair

The lines in the line spectrum of an atom results from energy absorbed by electrons dropping back down to a lower energy level energy absorbed by electrons jumping to a higher energy level energy released by electrons jumping to a higher energy level energy released by electrons dropping back down to a lower energy level none of the above

A gas mixture contains 237 kPa of sulfur dioxide and 125 kPa of carbon dioxide. What is the total pressure of the mixture? Select the correct answer below: 2.96 x 104 kPa 237 kPa 112 kPa 362 kPa

Intermolecular forces are Forces within covalent molecules that hold them together Electrostatic forces between ions Bonds between hydrogen and oxygen atoms in water molecules Attractive forces between separate molecules Covalent bonds within a network solid

What made scientists first believe that atoms contain equal numbers of protons and electrons? most alpha particles went straight through the gold foil some alpha particles were deflected by the gold foil the line spectra of excited atoms atoms are electrically neutral two of the above

For this question you will need to draw the VSEPR diagram of CH₂O. You will also need to list the number of bonding pairs and lone pairs on the central atom as well as including the name of the shape of the molecule. You need to show all of your work. This includes the valence electrons calculations, and drawings of what the molecules looks like as you are adding electrons and creating bonds. You should include at least 3 diagrams showing the progression of your molecule. Please take a picture of your drawings and calculations and upload it to the "Unit 1 - Test" dropbox within 5 minutes of finishing the test.

A sample of oxygen collected over water at a temperature of 29.0 °C exerts a pressure of 764 torr has a volume of 0.560 L. What is the dry gas pressure of the oxygen? (The vapor pressure of water at 29.0 °C is 30 torr.) Select the correct answer below: 730 torr 728 torr 734 torr 740 torr 9

What do the 3s and 3p orbitals in the hydrogen atom have in common? Select all that apply. They are in the same principal shell. They are in the same subshell. They have the same energy. They have the same basic shape.

Which was an assumption Bohr made in his model? Select the correct answer below: Wavelengths have negative values. Energy values were quantized. Neutrons are negatively charged. Electrons are found in the nucleus.

6 #1 - List the 3 types of intramolecular forces. Place the forces in order from strongest to weakest (I.e., #1 is the strongest; #3 is the weakest). 3 pts #2 - List the 3 types of intermolecular forces. 3 pts #3 - Convert the following (show all math work for conversion): 847 mm Hg = ? kPa 5 pts

A molecule has 9 valence electrons. What is true about its Lewis structure? Select the correct answer below: It will follow the octet rule. It will be an exception to the octet le because it is an odd electron molecule. It will be an exception to the octet rule because it has an electron deficient central atom. It will be an exception to the octet rule because it is hypervalent.

What is the electron-pair geometry and molecular structure of ammonia (NH₂)? Select the correct answer below: tetrahedral, tetrahedral tetrahedral, trigonal pyramidal trigonal pyramidal, tetrahedral trigonal pyramidal, bent

A molecule has a central atom from the fourth period. The central atom is bonded to five other atoms. What is true about this molecule's Lewis structure? Select the correct answer below: It will follow the octet rule. It will be an exception to the octet rule because it is an odd electron molecule. It will be an exception to the octet rule because it has an electron deficient central atom. It will be an exception to the octet rule because it is hypervalent.

Calculate the grams of aluminum hydroxide that will be produced if 86.865 grams of ammonium hydroxide react. Use the balanced chemical equation below. Al2(SO4)3(s) + 6NH4OH(aq) → 2Al(OH)3(s) + 3(NH4)₂SO4(aq) Write your answer with the correct number of significant figures, units and chemical formula.

.Draw the condensed structural formulas for each of the following peptides and give the three-letter and/or one-letter abbreviations: a. prolylaspartate b. threonylleucine c. methionylglutaminyllysine d. histidylglycylglutamylisoleucine

Using the Frost circle method (polygon method) provide an energy_diagram showing the relative energies of the molecular orbitals for the cyclopentadienyl anion. Clearly label and number each molecular orbital as bonding, nonbonding, antibonding (use *). Clearly show the nonbonding line and the ground state electron configuration.

A 150-ml bottle of mouthwash contains 14 mL of ethanol. What is the volume/volume percent concentration of ethanol? % (v/v) ethanol

What does the equation represent? .Ca. → Ca²+ + 2e¯ Select the correct answer below: Anions are formed by gaining valence electrons. Anions are formed by losing valence electrons. Cations are formed by gaining valence electrons. Cations are formed by losing valence electrons.

Hund's rule states that the electron configuration with the lowest-energy will have the maximum possible number of unpaired electrons. Which of the elements below would require special attention to this rule to correctly depict the orbital diagram? Select the correct answer below: H He N Be E

Calculate the molarity of each aqueous solution with the given amount of NaCl (molar mass 58.44 g/mol) and final volume. a. 2.60 mol in 0.920 L M b. 5.90 mol in 730. mL M c. 0.0920 mol in 8.90 mL M

Enter your answer in the provided box. What is the weight/volume percent concentration using the given amount of solute and total volume of solution? 67 g of NaNO3 in 250 mL of solution: % (w/v) NaNO3

Be sure to answer all parts. What is the molarity of a solution prepared using the given amount of solute and total volume of solution? a. 36.0 g of NaCl in 680 mL of solution: b. 46.0 g of NaHCO3 in 8.8 L of solution:

Circle and identify the functional groups in the following molecules...each molecule has 2 functional groups. (2 pts)

If the solubility of KCI in 100 mL of H₂O is 34 g at 20°C and 43 g at 50°C, label each of the following solutions as unsaturated, saturated, or supersaturated. If more solid is added than can dissolve in the solvent, assume that undissolved solid remains at the bottom of the flask. a. adding 14 g to 100 mL of H₂O at 20°C: (select) b. adding 42 g to 100 mL of H₂O at 50°C: (select) c. adding 17 g to 50 mL of H₂O at 20°C: (select) d. adding 38 g to 100 mL of H₂O at 50°C and slowly cooling to 20°C to give a clear solution with no precipitate: (select)

Be sure to answer all parts. What is the weight/volume percent concentration of a 31.0 % (w/v) solution of vitamin C after each of the following dilutions? a. 170. mL diluted to 490. mL: b. 0.39 L diluted to 860 mL:

Be sure to answer all parts. How many grams of NaCl are contained in each of the following volumes of a 1.23 M solution? b. 62 mL a. 0.24 L

Be sure to answer all parts. One gram (1.00 g) of vitamin B3 (niacin) is dissolved in water to give 15.0 mL of solution. (a) What is the weight/volume percent concentration of this solution? (b) What is the concentration of a solution formed by diluting 1.0 mL of this solution to each of the following volumes: [1] 16.0 mL; [2] 120 mL?

8. Ethanol (C₂H5OH) is the newest fuel replacement for automobiles. It burns in oxygen to produce carbon dioxide and water according to the following equation: C2H5OH) + 302(g) → 2CO2(g) + 3H₂O(g) a) What volume of water is produced at 85 KPa and 19 °C if 63.1 g of ethanol is bumed in excess oxygen?

The theoretical yield of a reaction A B is 2.8 g B and the percent yield of the reaction is 82.6%. What is the actual yield of the reaction? Select the correct answer below: 3.4 g 2.8 g 0.83 g 2.3 g

Pepto-Bismol, an over-the-counter medication used for upset stomach and diarrhea, contains 525 mg of bismuth subsalicylate in each 15-mL tablespoon. What is the weight/volume percent concentration of bismuth subsalicylate? % (w/v) bismuth subsalicylate

If you would like to radiolabel the nascent DNA strand synthesized from a given DNA template using radiolabeled (32P-labelled) dNTPs and DNA polymerase, what type of radiolabeled dNTP would be appropriate? Gama-32P DATP Beta-32P dATP alpha-32P dATP Delta-32P dATP

As kinetically-driven mechanisms, S2 and E2 favor the formation of the product that results from the lowest energy intermediate. results from the highest energy of activation barrier. results from the highest energy intermediate. None of the statements is correct. results from the lowest energy of activation barrier.

What measure is usually taken to convert hydroxyl into a good leaving group for an E1 reaction? Polarization of the medium by addition of silver nitrate Increasing the temperature Tosylation of the substrate Decreasing the temperature Protonation/acidification of the medium

From the following balanced equation, 4 NH3(g) +50₂(g) →→→ 4NO(g) + 6H₂O(g) how many molecules of H₂can be formed from 6.12 mol NH3? Select the correct answer below: 2.46 x 1024 molecules 6.02 x 1023 molecules 5.53 x 1024 molecules 2.21 x 1025 molecules K

Pantothenic acid is the vitamin portion of coenzyme A and it forms thioether linkages with acyl groups, resulting in acyl group deactivation towards nucleophilic attack.. True False

Some single displacement reactions involve one halogen replacing a less reactive halogen. Cl2, replaces iodine in Nal, producing I₂ and NaCl. Write the balanced single displacement reaction with the simplest whole number coefficients. . Do not include the states of the reactants or products. Provide your answer below:

When 5.58 g H₂react by the following balanced equation, 32.8 g H₂are formed. What is the percent yield of the reaction? 2 H₂(g) + O₂(g) →→→ 2H₂O(l) Select the correct answer below: 11.7% 17.0% 38.9% 65.7%

What does Zaitsev's rule state? As the degree of substitution around the C=C of an alkene decreases, the stability of alkene increases. None of the statements is correct. As the degree of substitution around the C=C of an alkene decreases, the stability of alkene decreases. As the degree of substitution around the C=C of an alkene increases, the stability of alkene decreases.

What is a strong acid? Select the correct answer below: An acid that is very concentrated. An acid that is not very dangerous. An acid that efficiently transfers protons to water molecules. An acid that remains undissociated.

What is the reaction condition that could be employed to switch the major process between substitution and elimination mechanisms? Concentration of the nucleophile/base Proticity of the solvent Polarity of the solvent Concentration of the substrate Temperature

Given the following equation, 2 KClO3 2 KCl + 3 0₂ how many moles of O₂ can be produced from 8.60 moles KCIO3? Report your answer with three significant figures Provide your answer below:

If a balloon containing 3.0 L at 25°C is cooled to -54°C, what is its new volume? The pressure and the moles of gas remain constant.

A vessel contained N₂, Ar, He, and Ne. The total pressure in the vessel was 855 torr. The partial pressures of nitrogen, argon, and helium were 189, 190, and 360 torr, respectively. The partial pressure of neon in the vessel was _____ torr.

When aqueous solutions of NH4OH(aq) and CuCl₂ (aq) are mixed, the products are NH4Cl(aq) and Cu(OH)₂ (s). What is the net ionic equation for this reaction? Select the correct answer below: 2NH,OH(aq)+CuCl,(aq) — + Cu(OH),(s)+2NH,Cl(aq) 2 NH(aq) + 2OH(aq) + Cu²+ (aq) + 2Cl(aq) → Cu(OH)₂ (s) + 2NH Cu²+ (aq) + 2OH(aq) → Cu(OH)₂ (s) NH(aq) + Cl(aq) → NH₂Cl(s)