General organic chemistry Questions and Answers

The name 4-ethylpentane is not an accepted name for the compound described. What would be the correct name for this compound? 1. 2-ethylpentane 2. 4-methylhexane 3. 1-ethyl-1-methylbutane 4. 3-methylhexane 5. n-heptane

The pk, of acetic acid, CH3COOH, is 4.76. What is the value of the equilibrium constant Keq, for the following equilibrium? Show work using the equation function from the menu above CH₂COOH + H₂O H₂00+ CH₂COO

Using the periodic table, what do you know about Indium? It is a large metal and likely to react with nonmetals. It is a small metal and unlikely to react with anything else It is a small nonmetal and likely to react with other metals It is a large nonmetal and unlikely to react with other metals It is a large nonmetal and likely to react with other nonmetals

Using the periodic table, what do you know about Rubidium? It has a high electronegativity and a high reactivity It is a small atom and has a low electronegativity It has a low electronegativity and has a high reactivity It has a low electronegativity and has a low reactivity It has a high electronegativity and a low reactivity

Which of these is most likely to react with Strontium? Selenium Xenon Potassium None of these Argon Krypton

How will an LOL diagram show energy being conserved? Energy will be destroyed. There will be more energy in the reactants than products All energy will be accounted for There will be more energy in the products than in the reactants The energy won't change

What is true about nuclear fission? Two small nuclei come together. It is not used in atomic bombs. It is occuring in the sun. Scientists have not yet been able to harness nuclear fission to create electricity. It occurs when a large unstable nucleus splits into smaller nuclei.

The effective nuclear charge, Zeff, for a valence electron can be approximated using the core charge of the atom; that is, the net charge of the nucleus and the inner (nonvalence) electrons. Determine the core charge for an atom of Ar.

If 24g of hydrogen gas is fully reacted with excess carbon, how many particles, in moles of benzene (C6H6) will form? 6C(s) + 3H2(g)--C6H6 2.3mol Benzene 4mol Benzene 24mol Benzene 312g Benzene 12mol Benzene

Sulfur has how many valence electrons? What is it's charge when it is stable? 2,6 2,2 6, -6 6,6 6,2 6, -2

Use the pka table to select a base to deprotonate nitrous acid (HNO₂) pka = 3.35 Write the acid base reaction Calculate the equilibrium constant to demonstrate that you selected a good base. Write the curved arrow mechanism in both directions

Write the curved arrow mechanism for the dissociation of sulfuric acid in water (show all bonds and lone pairs, i.e. Lewis structures) Which will be more abundant at 25 °C, sulfuric acid or hydronium ion? Why? What type of acid base reaction is this? Define the role of water, i.e Lewis base, Brønsted-Lowry acid, etc.

If 109g of water was created in the following equation, how much energy was released? CH4(g)+202(g) CO2(g) +2H₂O) AH = -890.8 Round to two decimal places.

Which of these is the least electronegative? Sodium Rubidium Potassium Hydrogen Lithium

If a person has 621mL of a 4.2M KCI solution. How many moles of KCI would be in the solution? (1000mL-1L) Round to two decimal places.

What is true about an endothermic reaction? They often feel hot to the touch. More bonds are being broken than formed More bonds are being formed than broken Equal amounts of bonds are being broken and formed No bonds are being broken or formed

If 3mol of solid carbon is reacted with 3mol of hydrogen gas, what mass of benzene (C6H6) is likely to form? 6C(s) + 3H2(g) --> C6H6(1) 234g Benzene 0.5g Benzene 78g Benzene 39g Benzene 24.2g Benzene

If a person has 162mol of K₂O, what mass, in grams, of K₂O doo they have? Round to two decimal places.

The molarity (M) of the Ca(NO3)2 solution when 61.3 mL react with 46.2 mL of 5.2 M Na3PO4

How would you prepare the following two compounds starting from benzene? (Proper sequence of steps with proper reagents necessary for each step must be given) HO. -NH₂ HO- -NH₂

You have 125.0 mL of a solution of H3PO4, but you don't know its concentration. If you titrate the solution with a 4.56 M solution of NaOH and reach the endpoint when 134.1 mL of the base are added, what is the concentration of the acid?

Which of the following solutions could be used to titrate a HCl solution with an unknown concentration if the titration was using a pH indicator? 1.5M HBr solution 2M NaCl solution 5.2M LICI solution 2M NaOH solution 1.68M water solution

Why does a balanced equation represent mass being conserved? Balancing an equation results in different amounts of mass in the reactants and products Balancing a reaction creates mass. Balancing a reaction results in the same molecules being present in the reactants and products. Balancing a reaction results in the same number and type of atom being present in the reactants and products. Balancing a reaction changes the type of substance being reacted, so mass is neither created nor destroyed.

What is the chemical formula for Aluminum Bisulfate? AIBI3 Al2(SO4)3 AI(HSO4)3 AI(HSO4)2 OAIHSO4

According to IUPAC, when counting the carbons in a branched hydrocarbon chain you would use the shortest possible chain. True False

Which of the following statements does not characterize an oxidizing agent? The oxidation number of an oxidizing agent decreases An oxidizing agent gains electrons An oxidizing agent causes another species to be oxidized An example of a good oxidizing agent is an alkali metal, such as sodium (Na)

M/ Ch. Many alcohols are made by the addition reaction of what two types of compounds? water and alkenes alkanes and alkenes Oesters and ethers water and alkanes

M/Ch. In a hydration reaction, an alkene is converted to what type of compound? an alkyne an alcohol an amide an aldehyde

Which species is oxidized in the following reaction? 2Hg²+ + N₂H4 → 2Hg + N₂ + 4H This is a reduction reaction not an oxidation reaction Nitrogen Hydrogen Mercury

What are the intermolecular forces experienced by the interaction of the following molecules? NH3 and C6H6 (benzene) only dispersion forces dipole-induced dipole forces and dispersion forces ion-induced dipole forces and dispersion foces dipole-dipole and dispersion forces

Using the following activity series of metals, which of the listed metal ions would be replaced if combined with copper metal in a single replacement reaction? a. Lead b. Platinum c. Cadmium d. Strontium

Identify the best reagents to achieve the following transformation: 1. conc. H₂SO4, heat; 2. HBr, ROOR 1. NaOEt; 2. HBr, ROOR; 3. t-BuOK 1. NaOEt; 2. BH3 THF; 3. NaOH, H₂O2 1. conc. H₂SO4, heat; 2. HBr

Metal Specific Heat (J/g°C) Calcium 0.647 Iron 0.449 Silver 0.235 Gold 0.129 Ten grams of all four substances above are pulled from the same container of hot oil with a temperature of 250°C. Determine which substance will cool off fastest and explain how you know.

Write balanced equations for the ionization of each of the following carboxylic acids in water. acetic acid

Which of the following statements is (are) true for the compound (R)-2-butanol? A) This compound is chiral. B) This compound is optically active. C) This compound has an enantiomer D) all of the above E) none of the above

Give the products for each of the following processes Drag the appropriate items to their respective bins. Product of hydrogenation palmitic acid Br₂ 0₂ alkane Product of hydrolysis glycerol the potassium salts of the fatty acids Product of saponification ethylene glycol Not a product of these reactions Reset

A compound is found to contain 45.71 % oxygen and 54.29 % fluorine by mass. What is the empirical formula for this compound?

The saponification of an ester produced isopropanol and sodum octanoate. What ester underwent hydrolysis to give these products View Available Hint(s) isopropyl octanoate Isopropyl octanol isopropyl octanoic acid) octyl isopropanoate

A compound is found to contain 6.360 % silicon, 36.18 % bromine, and 57.46 % iodine by mass. What is the empirical formula for this compound? To answer the question, enter the elements in the order presented above.

Enter your answer in the provided box. How many degrees of unsaturation are present in C8H₂CIO? degrees of unsaturation

What is the total number of oxygen atoms present in Mg(CIO3)2? 2 6 3 5

Show the calculation of osmolarity for each of the following solutions. 3 points a. 0.75 M magnesium nitrate solution has osmolarity of b. 1.5 M sucrose solution has an osmolarity of c. 0.952 moles of a copper (II) chloride in 806 mL of water has an osmolarity of

Increasing pressure speeds up the rate of a chemical reaction because particles are compacted in a smaller volume, therefore increasing particle collisions. Pressure only affects which phase? aqueous gas liquid solid

Enter the balanced chemical equation for the reaction of each of the following carboxylic acids with KOH 3-methylpentanoic acid (CH₂CH₂CH(CH3)CH₂COOH) Express your answer as a chemical equation. Assume that there is no dissociation (.e., enter only whole compounds, not i

Apply the Pauli exclusion principle. (a) Indicate which orbitals in the following list fill before the 4p orbitals. 3d _4s _4d_ 5s (b) What is the maximum number of electrons in the 4f subshell? (c) An electron in an orbital has the following quantum numbers: n = 3, l = 2, m₁ = 0, and ms = +1/2. Identify the type of orbital. What is the direction of the electron spin?

Estimate A proton's mass is estimated to be 1.6726 × 10-24 g, and the mass of an electron is estimated to be 9.1093 × 10-28 g. How many times larger is the mass of a proton compared to the mass of an electron?

Calculate ΔH for the reaction: C₂H4 (g) + H₂ (g) → C₂H6 (g), from the following data. C₂H4 (g) +3O₂ (g) → 2 CO₂ (g) + 2 H₂O (l) C2H6 (g) + 3 1/2O, (g) → 2 CO2 (g)+ 3 H2O (l) H₂(g) + 1/2O₂(g) → H₂O (l)

If CO₂ is being produced in the solution at a faster rate than H₂CO3, then the rate of the reaction is faster than the rate of the reaction. a. forward / reverse b. reverse / forward c. neither A nor B is correct

A mixture of equal amounts of two enantiomers A) is called a racemic mixture B) is optically inactive A) is called a C) implies that the enantiomers are meso forms D) both A and B E) none of the above

Photosynthesis uses 670-nm light to convert CO₂ and H₂O into glucose and O₂. Calculate the frequency of this light. Frequency: Hz