General organic chemistry Questions and Answers

Round answer to proper significant figures and label with proper units. 2Al(s) + 6HCI (aq) → 2AICI3(aq) + 3H₂(g) If 17.4 grams of hydrochloric acid (HCI) reacted, how many grams of hydrogen (H₂) were produced? NOTE: HCI has a molar mass of 36.46g and H₂ has a molar mass of 2.02g. a. 0.482 g H₂ b.0.96 g H₂ c. 8.6 g H₂ d.314 g H₂ e.628 g H₂

Draw the ketone(s) you would expect to form by reacting the following alkynes under the conditions of oxymercuration: (a) 6-methyloct-1-yne, (b) 1,10-dicyclohexyldec-5-yne, and (c) 5-phenylhex-2-yne. alkyneHgSO4, H₂SO4 ---> H₂O ketone

The following diagram represents the collection of CO₂ and H₂O molecules formed by complete combustion of a hydrocarbon. Part A What is the empirical formula of the hydrocarbon? Express your answer as a chemical formula. A chemical reaction does not occur for this question.

If aqueous solutions of potassium chromate and barium chloride are mixed, a bright yellow solid (barium chromate) forms and settles out of the mixture, leaving potassium chloride in the solution. Choose a balanced chemical equation for this process. K₂ CrO4 (aq) + 3BaCl₂ (aq) → BaCrO4(s) + KCl(aq) K₂ CrO4 (aq) + BaCl₂ (aq) → BaCrO4(s) + 2KCl(aq) K₂ CrO4 (aq) + 2BaCl₂ (aq) → 5BaCrO4(s) + 3KCl(aq) K₂ CrO4 (aq) + 3BaCl₂ (aq) → 4BaCrO4(s) + 2KCl(aq)

Which set of hybridization states of C1, C2, and C3 of the following molecule is correct? a) sp², sp², sp² b) sp², sp², sp c) sp³, sp2, sp d) sp³, sp², sp²

Provide the correct IUPAC name for the skeletal (line-bond) structure shown here. Stereochemistry is ignored.

How is an ideal gas more "ideal" than a real gas?An ideal gas cannot be heated or cooled. Ideal gases have forces of attraction between particles. Ideal gases cannot be compressed. An ideal gas cannot be condensed into a liquid.

Select the proper reaction sequence to convert benzene to 3-butyl-1-bromobenzene in a reasonable yield. a. 1. Br./FeBr; 2. butanoyl chloride/AICI,; 3. Hg(Zn), HCl(aq) b. 1. Butanoyl chloride/AICI; 2. Br./FeBr; Hg(Zn), HCl(aq) c. 1. HNO/H₂SO. (aq); 2. butanoyl chloride/AICI; 3. HBr(aq)/heat d. 1. Butanoyl chloride/AICI,; 2. HNO./H.SO.(aq); 3. HBr(aq)/heat

A mixture of He, Ne, and Ar has a pressure of 28.4 bar at 28.0 °C. The partial pressure of He is 2.46 bar and the partial pressure of Ar is 4.78 bar. Calculate the partial pressure of Ne.

Which of the following is an example of the Truman Doctrine in action? a Sharing atomic secrets with our allies. b Putting Nazi war criminals on trial. c Beginning the space race after Sputnik's launch. d Defending South Korea during the Korean War.

Select the hybridization of the sulfur atom in CS₂ sp² sp sp³ sp³d2 sp³ d

Give one example for each for of these reactions (reactant----reagent--- product, mechanism not needed) Wittig Fisher esterification Tollens

Select the mass of 3.57 mol of CO2. 201 g 4.89 x 1022 g 2.15 x 1024 g 0.0811 g 157 g

Which of these molecules will only have single bonds? Draw Lewis structures of these molecules and select the one that has only single bonds N₂H₂ All options C₂Cl4 CH3SH C₂H4

Determine the pH for the following solutions: a. [OH-] = 1.0 × 10-7 M b. [H3O+] = 4.2 × 10-³ M c. [H3O+] = 0.0001 M d. [OH-] = 8.5 x 10-⁹ M

Which bond is the most polar? Select the most polar bond. Se-Cl Se-Br Se-F Se-S Se-O

Which of the following features of Postmodernism is most predominant in Vonnegut's story, "Harrison Bergeron"? The presentation of truth as absolute and universal Use of dystopian settings to comment on contemporary life Decreasing contact with the actual, physical world Use of multiple points of view and perspectives

For each compound name, provide the following: a) correct stereochemical representation (i.e. wedge/dash) d) draw a plane of symmetry where appropriate e) draw any enantiomer f) draw any diastereomers g) label the structure as chiral or achiral a) (3S, 6S)-3-tert-butyl-6-methyl-1-octyne

Look at the following chemical equation. 4 Al +3O₂ --> 2 Al₂O3 What is true about this chemical equation? A. It is balanced because the number of reactants is equal to the number of products. B. It is unbalanced because the number of reactants is greater than the number of products. C. It is unbalanced because the mass of the reactants is greater than the mass of the products. D. It is balanced because the mass of the reactants is equal to the mass of the products.

An ionic bond forms between two atoms through _. sharing of electron pairs transferring of electrons from metallic atoms to nonmetallic atoms transferring of protons from the nucleus of the nonmetal to the nucleus of the metal each atom acquiring a negative charge

The chloride ion has the same electron configuration as an Ar atom a Ne atom a Kratom a bromide ion

Aluminum has a density of 2.70 g/cm³. What is the volume of 420.5 g of aluminum? 6.42 x 10-3 cm³ 1.14 x 10³ cm³ 13.0 cm³ 156 cm³

_ and its laws are obeyed by living cells. Cryogenics Bioinformatics Thermodynamics Metal catalysis

Natural gas is mostly formed from A. water B. marine mud C. sand D. old trees

A reaction between lead (II) nitrate and potassium iodide is a synthesis reaction single displacement reaction combustion reaction double displacement reaction

Few chemical reactions are permanent. True False

Which set of numbers will correctly balance the given equation? Mg(NO3)₂(aq) + Na₂Cr₂O7(aq) → MgCr₂O7(s) +_ NaNO3(aq) -1, 1, 1, 2 1, 2, 2, 2 1,4, 1, 2 2, 1, 1, 4

Atom X has 27 protons, 29 neutrons, and 27 electrons. Atom Y has 27 protons, 30 neutrons, and 27 electrons. Atoms X and Y are _. isomers isobars isotopes isoelectronic

Determine the type of reaction shown and balance the equation. In addition, explain the process you used to balance the equation. Na + O₂ → Na₂O

Hund's Rule is being broken in which of the following orbital diagrams?

Which of the following statements is NOT part of Dalton's atomic theory? All matter is made up of atoms Atoms of two or more different elements combine to form compounds The nucleus of an atom is dense and positively charged Atoms are never created or destroyed during a chemical reaction

Carry out the following calculations with the correct number of significant figures: 22.41 +0.523 + 26.4012 49.3342 49.334 49.33 49.3

Which of these is not suitable for the synthesis of 3-methyl butanoic acid? treat 1-bromo-2-methyl-propane with Mg, ether, than treat with CO2, then aqueous acid workup 3-methyl but-1-ene treated with B₂H6-THF, followed by H₂O₂ in NaOH; then treat with Na₂Cr₂O7 in aq. H₂SO4 4-methyl pent-1-ene treated with hot acidic KMnO4 2-bromo-3-methyl butane treated with NaCN followed by hydrolysis (H3O+, heat)

When multiplying or dividing measured numbers, we use the measurement with the least number of significant figures to determine the number of significant figures (sf) in our answer. For example: 3.5 cm x 4.75 cm = 17 cm² (even though the calculator gives 16.675) Solve the following problems assuming all are measured numbers. Report the correct number of significant figures. a. 7.00 x 15.00 = b. 40.21.901 = c. (0.003) (13.2) = d. 1.590 0.3975 =

Arrange in the increasing order of pka. 2-bromo-3-methyl-butanoic acid (A) 3-bromo-2-methyl butanoic acid (B) 2-ethyl-3-methyl butanoic acid (C) 2-chloro-3-methyl butanoic acid (D) A<B<D<C D<B<A<C D<A<B<C C<B<A<D

A 1.9-mol sample of KCIO3 was decomposed according to the equation 2KCIO,(s)→2KC(s) + 30₂ (g) How many moles of O₂ are formed assuming 100% yield? 1.3 mol 1.6 mol 1.9 mol 1.0 mol 2.8 mol

Which set of quantum numbers below describe the electron that is highest in energy. n=4, 1=2, m₁ = 2₁ mg = + ½ n= 1, 1 = 0, m₁ = 0, ms = + ½ n= 1, 1 = 0, m₁ = 0, ms = -1/2 n = 4,1 = 2, m₁= 3, mç = -1/2 n=3, 1=2, m₁ = 1, ms = +½

What is the valence electron configuration of a group 2 element. ns²np7 ns² ns¹ ns² np5 ns²np6

How many valence electrons are in an atom of gallium? three five one four two

What is the energy of green light with a wavelength of 542 nm 2.72 1018 J 2.72 1027 J 5.55 1014 J 3.68 10-28 J 3.68 10-19 J

The wavelength of light that has a frequency of 1.66 x 109 s-1 is 5.53 2.00 × 10-9 0.181 5.53 x 108 4.98 × 1017

Select the most metallic element from the group below. sodium calcium barium cesium magnesium

How many orbitals are present in the n = 4 shell of an atom? 32 4 10 16 5

The ground-state electron configuration of the element is [kr]5s14d5. OTC OMn Mo cr Nb

Which of these elements has the highest first ionization energy? Rb Li Ne O F

Indicate the ground state electron configuration for aluminum. 15²2s²2p¹ 15²25²2p635¹3p² 15²25²20635² 15²25²2p63s²3pº 15²25²2635²3p¹

In which set of elements would all members be expected to have very similar chemical properties? Br, I, At Ne, Na, Mg P, Se, I Si, As, Te Cl, Br, Na

What is true below for an atom that is in its ground state electron configuration. Unpaired electrons in the same orbitals have opposite spins. Orbitals within a subshell are filled to maximize the pairing of electrons. Electrons are promoted to a higher-energy orbital before they are paired in the same orbital. Electrons fill higher-energy shells before filling lower-energy shells. Unpaired electrons in different orbitals have opposite spins.

Which of the following is NOT a structural isomer of 2-methylpentane? 1. 1,2 dimethylbutane 2. hexane 3. 2,2-dimethylbutane 4. 2,2-dimethylpropane 5. 2 ethyl butane

Identify the atom with the ground-state electron configuration shown for its valence shell. 4s²3d¹04p6