Organic Chemistry Questions

Draw the Two Chair Conformations of 1,4-cis-dihydroxycyclohexane

What is true about the following sentence (look at the main verb)? "They walked 1600 miles in intense heat across the Gobi Desert." A) The events started in the past and continue in to the present B) The events started and finished in the past. C) The events are happening now. D) The sentence expresses a habit or ritual.

What is the meaning of the following sentence? "Since childhood, she has traveled widely in harsh climates and across rough lands." A) She started traveling a lot when she was young, and she still does it. B) She traveled a lot when she was a child. C) She is traveling right now. D) She travels a lot.

When do we use Past Progressive tense? Check ALL correct answers A) For completed action or event B) For an action or event that continued at some time in the past C) For an action or event that continued when another action happened. D) For a action or event happening currently.

If the Nutrition Facts indicated that 1 serving size was equal to 35g and the total fat was 12g, the theoretical amount of fat that could be recovered from a sample size of 6.6g would be ___ 2.26g of fat none of these are correct 3.33g of fat 1.65g of fat

Mark all of the items below that can be considered electrolytes ionic compounds molecular compounds weak acids strong bases

Action of Grignard's reagent on carbonyl compounds followed by hydrolysis gives alcohols. How many different combinations of Grignard's reagent and carbonyl compounds are possible to prepare all structural isomeric butyl alcohols?

How many of the following alcohols give turbidity immediately with Lucas reagent? Cyclopropylmethanol, benzyl alcohol, t-butyl alcohol, isopropyl alcohol, sec- butyl alcohol, neopentyl alcohol, but-3-en-2-ol

When iron rusts in moist air, the product is typically a mixture of two iron-oxygen compounds. In one compound, there is an equal number of iron and oxygen atoms. In the other compound, there are three oxygen atoms for every two iron atoms. Choose the formulas for the two iron oxides. (Select all that apply.) FeO FeO₂ Fe₂O Fe₂O 4 Fe₂O3

Identify the correct statement(s) Salicylic acid is more acidic than salicylaldehyde Salicylic acid is less acidic than Phenol Salicylaldehyde is more acidic than carbolic acid Salicylic acid is more acidic than carbolic acid

What is true about Stative Verbs? Check all true answers below. A) They express actions happening right now. B) They express states or conditions C) They can express feelings, senses, desires, or mental states D) They are usually used in a Progressive tense E) They are usually used in a Simple tense (not progressive)

Balance the equation for the reaction of aluminum metal with solid iodine to form solid aluminum iodide. 2Al(s) + 312(s) → 2A113(s) Al2(s) + 312(s) → 2A113(s) Al2(s) + 16(s) → 2A1I3(s) Al(s) + I₂(s)→ All₂(s) Al(s) + I(s)→ All(s)

Write the formulas for the compounds given below. a) mercury (III) bisulfite b) hydrophosphoric acid c) gold (V) chlorite d) trinitrogen decoxide e) zinc nitride

Classify the following as a heterogeneous mixture, homogeneous mixture (solution), or a pure substance: hot tea with lemon juice A. heterogeneous mixture B. homogeneous mixture/solution C. pure substance

What is the organic product of the reaction between ethanol and ethanoic acid in the presence of sulfuric acid? A. CH3CHO B. CH3COOCH3 C. CH3CH₂COOCH3 D. CH3COOCH₂CH3

One mole of aspartame (C14H18N2O5) reacts with two moles of water to produce one mole of aspartic acid (C4H7NO4), one mole of methanol (CH3OH) and one mole of phenylalanine. a. What is the molecular formula of phenylalanine? Hint b. What mass of phenylalanine is produced from 378 g of aspartame?

Draw the Lewis symbol for krypton. Draw the Lewis dot structure for krypton. To change the symbol of an atom, double-click on the atom and enter the letter of the new atom.

As a result of the "leveling effect," the strongest acid that can exist in appreciable concentration in aqueous solution is H₂SO4 HCI H30 HNO3 H₂O

Draw a structure of each of the following: a. Aldehyde b. Ketone c. Ester d. Carboxylic acid e. Amide f. anhydride Your structure must contain at least 6 carbons and two substituents. Provide the IUPAC for each of your drawings

Use Avogadro's number (6.02 x 1023) to calculate how many hydrogen atoms are contained in exactly 1 teaspoon of water. The density of water is 1.00 g/mL and 1 teaspoon = 4.929 mL. Hint: The molecular weight of water is 18.0 g/mol 2.97 x 1024 atoms 1.65 x 1023 atoms 1.22 x 1023 atoms 3.30 x 1023 atoms

Enter both the numeric valueland the units. Round the numeric value to three decimal places if necessary. Write the unit in the proper metric system abbreviated form.

Write the composition of one atom of the 117Sn isotope. protons neutrons electrons

If you were to have a mythical AA based on Glutamic acid in which the carboxylate on the side chain is replaced by an amine group with pKa of 11.0. What would be the predominant form of this AA at pH 4, 7 and 12? Draw these structures

a) The reaction of two amino acids such as Glycine and Alanine generate a peptide bond and water as a by-product. Draw the peptide bond generated between these two Amino acids. 2- Show the resonance structure for the bond you just drawn.

How many electrons, protons, and neutrons are there in an atom of 244 Pu? protons neutrons electrons

Which of the following examples below could be used to summarize the results of scientific experiments? graphing experimental results drawing a picture forming a hypothesis asking questions creating a visual model

What is chronological order? Arranging events in the order of time Arranging events in the order of importance Arranging events in the order of their arrangement

The mass number of an atom can be determined if the components of the atom are known. What is the mass number of an atom containing 35 protons, 35 electrons, and 44 neutrons? Mass number =

A beaker containing a mixture of water and ethanol needs to be separated into its components. These liquids can be separated by__ based on the liquids'__ properties. chromatography, chemical distillation; physical reverse osmosis; physical centrifugation; chemical

A chemist must prepare 550. ml. of 5.00 µM aqueous mercury(II) iodide (Hg1₂) working solution. She'll do this by pouring out some 58.7 aqueous mercury(II) iodide stock solution into a graduated cylinder and diluting it with distilled water. Calculate the volume in mL of the mercury(II) iodide stock solution that the chemist should pour out. Round your answer to 3 significant digits.

3- Write Henderson-Hasselbalch equation and define each term in this equation. Define the pH of an acidic solution and for a basic solution (give ranges). For a weak acid solution define the pka-value. What is the pka-values for formic acid, butanoic acid and acetic acid (all found in the biological environment) which acid is more acidic? Why? Draw the structure of these acids.

What is the maximum number of electrons possible in the shell with n = 3 in an atom?

Which of the following elements are nonmetals? (Z= atomic number) Choose all that apply. Cs (Z = 55) Kr (Z=36) Cr (Z=24) Ar (Z = 18) None of the Above

How many protons, neutrons and electrons are there in a neutral atom of the isotope with the nuclear symbol: 59 Fe 26

What is the atomic weight for the element that is in group 8A and period 1? What is the atomic weight for the element that is in group 6A and period 2? What is the atomic weight for the element that is in group 1B and period 5? What is the atomic weight for the element that is in group 1A and period 6?

(1) Write the electron configuration for the beryllium atom. (2) Write the electron configuration for the sulfur atom.

The compound Cu(NH3)4SO4 is made the following reaction of copper II sulfate and ammonia: CuSO4 (aq) + 4 NH3 (aq) → Cu(NH3)4SO4 a) If 10.0 g of CuSO4 are reacted, determine the theoretical yield of Cu(NH3)4SO4. b) The reaction is run to completion and you obtain 12.6 g of Cu(NH3)4SO4. What is the % yield of the reaction?

One isomer of 2-methylbutane could be hexane. True False

Draw the skeletal structure for the (CH3)2CHCOCH₂CH(CI)CH(OH)C(CH3)3

The ideal gas law is known as PV = nRT Where P, V, n, and T refer to pressure, volume, moles and temperature respectively (these values can all change), and R has a value of 0.0821. If an experiment was run in a 0.50 L flask at a pressure of 1.058 atm in a room that was 308.76 K, how many moles were involved in the experiment? Report your answer to 3 decimal places.

Decide if the following statement is true or false: Protons and electrons are equal in mass, but opposite in charge.

1- Select the correct answer: Macro-Bio molecules can be categorized as Proteins/Enzymes, Nucleic acids, and polysaccharides or (carbohydrates). The monomer biomolecuels that make up DNA/RNA are: a) Sugars b) Amino acids c) Nucleotides d) Metal ions e) Fatty acids One of the following is NOT an American Chemical Society Journal; choose this one. a) Biochemistry Biomacromolecules b) Bioconjugate Chemistry c) d) Molecular Pharmaceuticals Journal of Chemistry e) South African

The element indium has two stable isotopes, indium-113 with an atomic mass of 112.9043 amu and indium-115 with an atomic mass of 114.9041 amu. From the atomic weight of In=114.82 one can conclude that: indium-115 has the highest percent natural abundance indium-113 has the highest percent natural abundance both isotopes have the same percent natural abundance

A general chemistry student found a chunk of metal in the basement of a friend's house. To figure out what it was, he used the ideas just developed in class about density. First he measured the mass of the metal to be 299.5 grams. Then he dropped the metal into a measuring cup and found that it displaced 15.3 mL of water. Calculate the density of the metal. Density= g/mL Use the table below to decide the identity of the metal. This metal is most likely

How many structural isomers does C5H91 have? (5 carbons, 9 hydrogens and one iodine) 6 7 9 5 8

What is the formula of the compound in which the atom combining ratios are: chlorine : oxygen : fluorine = 1:3:1 Enter elements in the order given:

(a) Mendeleyev discovered that when elements are arranged in order of increasing atomic weight, certain sets of properties recur periodically (b) Main-group elements are those in the columns 3A to 8A of the Periodic Table. (c) Nonmetals are found at the top of the Periodic Table, metalloids in the middle, and metals at the bottom. (d) Among the 118 known elements, there are approximately equal numbers of metals and nonmetals. (e) A horizontal row in the Periodic Table is called a group. (f) The Group 1A elements are called the "alkali metals."

Which of the following apply to the electron ? Choose all that apply. mass= 1 amu charge=-1 mass = 0 amu charge = +1 charge-0

1 PCl5 + 4H₂O → 1 H3 PO4 + 5 HCl If a reaction uses 12 moles of water, how much phosphoric acid (H3 PO4) will be produced? 4 moles 3 moles 48 moles 1 mole

A gas cylinder with a volume of 10.0 L contains 37.9 g of gas. What is the density of the gas?