Organic Chemistry Questions

A cough medicine contains 0.20% (w/v) dextromethorphan, a cough suppressant, and 2.5% (w/v) guaifenisin, an expectorant. How many milligrams of each drug would you obtain from 2.0 tsp of cough syrup? (1 tsp = 4.93 mL) mg dextromethorphan mg guaifenisin

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

In an SN2 reaction, how will the rate be affected if the concentrations of substrate and nucleophile are halved and quadrupled, respectively? None of the answers is correct. The rate will increase to 2 times its original value. The rate will increase to 0.5 times its original value. The rate will decrease to 0.5 times its original value. The rate will decrease to 2 times its original value.

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.

How many molecules of O2 are required to react with 3.6 mol H₂? 2 H₂ + O₂ → 2H₂O • Use 6.022 x 1023 mol-¹ for Avogadro's number.

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

Be sure to answer all parts. Write an expression for the equilibrium constant for the reaction. 2 NO(g) + O₂(g) = 2 NO₂(g)

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:

According to the below equation, how many moles of P2H4 will be required to generate 1.76 x 1023 molecules of P4? 6P2H48PH3 + P4 • Use 6.022 x 1023 mol-¹ for Avogadro's number. • Your answer should have three significant figures. Provide your answer below: mol

Automobile air bags use the decomposition of sodium azide as their source of gas for rapid inflation: 2NaN3 (s)→ 2Na (s) + 3N₂ (g). What mass (g) of NaN3 is required to provide 40.0 L of N₂ at 25.0 °C and 890 torr?

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)

What are the correct units of molarity. mol/L g/L L/mol g/mol

Be sure to answer all parts. Calculate the equilibrium constant for the reaction using the balanced chemical equation and the concentrations of the substances at equilibrium. Use the appropriate significant figures in reporting the answers. CO(g) + H₂O(g) = CO₂(g) + H₂(g) K= [CO]=0.201 M; [H₂O] = 0.0204 M; [CO₂] = 0.139 M; [H₂] = 0.139 M

If you pack a bag of potato chips for a snack on a plane ride, the bag appears to have inflated when you take it out to open. If the initial volume of air in the bag was 380 mL at 760 mm Hg, and the plane is pressurized at 630 mm Hg, what is the final volume (in mL) of the bag? The temperature and the number of gas particles do not change.

Determine the mass (in grams) of C4H10 that is required to produce 14.7 g CO₂. The balanced equation for the complete combustion of butane is shown below. 2 C4H10 +130₂ → 8 CO₂ +10 H₂O

What is the type of reaction involved in the following equation? 3H2(g) + N₂(g) → 2NH3(g) Select the correct answer below: displacement reaction decomposition reaction double displacement reaction combination reaction

Based on the following equation, if we want to produce 25 g NaCl, how many grams of MgCl₂ would we need? MgCl, + 2NaOH → MgOH, + 2NaCl Select the correct answer below: 13 g MgCl₂ 20. g MgCl₂ 26 g MgCl₂ 50. g MgCl₂

Convert 0.0000386 to scientific notation Write your answer on the textbox below To write the exponent, you may use the T2 button above the text box

What does the "2" in SN² signify? It signifies the word bio-molecular. It signifies the rate dependence on the concentrations of both the nucleophile and the substrate. It signifies the fact that the reaction is always reversible (happens in 2 opposing directions). It signifies the fact that there are two species involved in the reaction: The nucleophile and the substrate.

Click in the answer box to activate the palette. Predict the precipitate produced by mixing an Al(NO3)3 solution with a NaOH solution. Write the net ionic equation for the reaction. (Include the states of matter.)

Calculate the value of [OH-] from the given [H3O+] and label the solution as acidic or basic. a. 4.6 × 10-3 M ) b. 1.7 × 10-12 M

Write the formula for the following name. Write the formula in the appropriate blanks. Name 1. pentacarbon nonachloride 2. barium nitride 3. iron (III) oxalate 4. lithium chloride trihydrate 5. nitrogen dioxide Formula

Be sure to answer all parts. Write ionic and net ionic equations for the following reactions. Be sure to include the states for each species. (a) Na₂S(aq) + ZnCl₂(aq) → Total ionic: Net ionic: (b) Mg(NO3)2(aq) + 2 NaOH(aq) → Total ionic: Net ionic:

Be sure to answer all parts. Calculate the formula weight and molar mass of the following biologically active compound. C16H16CINO2S (Plavix), a drug used to treat coronary artery disease amu, g/mol

Be sure to answer all parts. How many moles of NaCl are contained in each volume of aqueous NaCl solution? a. 7.7 L of a 2.9 M solution mol NaCl b. 82 mL of a 5.4 M solution mol NaCl

Which element in each pair is larger? a. potassium and rubidium (select) b. oxygen and fluorine (select) c. argon and arsenic (select) d. silicon and gallium (select)

Which pairs of elements are likely to form ionic bonds and which pairs are likely to form covalent bonds? a. lithium and fluorine (select) c. two nitrogen atoms (select) b. selenium and oxygen (select) d. carbon and oxygen (select)

What is the weight/volume percent concentration using the given amount of solute and total volume of solution? 50.0 g of LiCl in 850 mL of solution: % (w/v) LICI

How many moles of gas are contained in a human breath that occupies 0.40 L and has a pressure of 741 mm Hg at 36°C? mol

5. Write the formula for the following compounds. A) Lithium acetate B) Magnesium hydroxide C) Mercury (I) chloride D) Manganese (III) fluoride E) Ammonium sulfate F) Silver sulfide G) Nickel (II) nitrate H) Gold (I) nitride I) Barium phosphide J) Calcium cyanide_ K) Lead (IV) sulfite L) Chromium (III) chlorate M) Copper (II) hypochlorite N) Trinitrogen pentasulfide O) Dihydrogen dioxide P) Iron (III) nitrite Q) Carbon tetrachloride R) Sulfur hexafluoride

The typical air pressure in Dallas is 740 mm Hg. What are the partial pressures of O₂ and N₂, which compose 21% and 78% of the atmosphere, respectively?

How many moles of solute are contained in each solution? a. 240 mL of a 0.34 M NaNO3 solution: b. 79 mL of a 2.2 M HNO3 solution: c. 6.9 L of a 4.9 M HCl solution:

Be sure to answer all parts. What types of intermolecular forces are exhibited by each compound? Acetaldehyde is formed when ethanol, the alcohol in alcoholic beverages, is metabolized, and acetic acid gives vinegar its biting odor and taste. a. acetaldehyde (select) b. acetic acid

Write the symbol and charges for the following ions: Example: calcium = Ca²+ A) phosphide= D) chlorate= F) fluoride = I) tin (IV) = B) magnesium =. E) cyanide = G) aluminum J) gold (I) = C) strontium F) sulfite = H) sulfide = K) manganese (III):

Be sure to answer all parts. How many moles are contained in each number of grams of table sugar (C12H22O11, molarity 342.3 g/mol)? Enter your answer in scientific notation. b. 0.0880 g a. 75.0 g

Acids and bases can neutralize each other in double displacement reactions. For example, if hydrogen chloride (a strong acid, HCl) is mixed with sodium hydroxide (a strong base, NaOH), the products are water, H₂O, and salt, NaCl. Write the balanced double displacement reaction with the simplest whole number coefficients.

Be sure to answer all parts. Draw a Lewis structure for N₂H4 and explain why the shape around each N atom should be described as trigonal pyramidal. Each N in N₂H₂ has trigonal pyramidal geometry since each nitrogen has (select) atoms and (select) ✓ around it.

Be sure to answer all parts. Using the balanced equation for the combustion of acetylene, answer the following questions. 2H_C=C_H+502→4CO2+2 H,O a. How many moles of O₂ are needed to react completely with 2.60 mol of C₂H₂? mol O₂ b. How many moles of C₂H₂ are needed to form 0.66 mol of CO₂? mol C₂H₂