Organic Chemistry Questions

For each pair of elements label the element from which it is easier to remove an electron. a. rubidium and strontium (select) b. fluorine and neon (select) c. nitrogen and arsenic (select) d. chlorine and selenium (select)

Question 7 (1 point) For this question, Vibranium (Vb) is a fictional metal in group 2 of the Periodic table. Write the formula for Vibranium Nitride Question 8 (1 point) For this question, Adamantium (A) is a fictional transition metal with multiple possible charges. Write the formula for: Adamantium (II) Hyponitrite

Be sure to answer all parts. Some coal is high in sulfur (S) content, and when it burns, it forms sulfuric acid (H₂SO4), a major component of acid rain, by a series of reactions. Balance the equation for the overall conversion draw below. S(s) + O₂(g) + H₂O(1)→ H₂SO4(aq)

Be sure to answer all parts. Give the electronic configuration for antimony and then convert it to noble gas notation. (Give the electronic configuration first and the noble gas notation second with the orbitals in order of increasing energy.) antimony: 9

Which represents the greatest mass of sulfur? 1 gram of sulfur 0.5 mole of sulfur 1 molecule of sulfur 6.02 x 1023 atoms of sulfur How many moles are in 1.204 x 1024 molecules of CO? 2 moles 6.02 moles 5 grams 1.2 moles

Be sure to answer all parts. Identify the element that fits each description. a. an alkali metal in period 3: [(select) b. a transition metal in period 5, group 6: (select) c. a main group element in period 3, group 5A: (select)

For the following pairs of elements: Phosphorus and Barium i) State if a bond is formed and why (if the answer is no, stop here but EXPLAIN WHY) ii) State the type of bond that is formed (if there is a bond) iii) In your rough notes, if a bond is formed show how this type of bond forms using Lewis Dot Diagrams

Consider the following chemicals and answer the questions below I. F2 II. CH₂Cl2 III. CH3OH IV. CO2 a. Which chemical has the highest boiling point? (answer using the Roman numeral) b. Which chemical has the highest vapor pressure? (answer using the Roman numeral) c. Which chemical is capable of hydrogen bonding with other identical chemicals? (answer using the Roman numeral) d. How many of the above chemicals can participate in dispersion interaction with other identical chemicals? (answer using a number) e. How many of the above chemicals can have dipole-induced dipole interaction with H₂O molecules? (answer using a number)

You analyzed 2.81 grams of a mixture of NaCl, SiO2, and CaCO3. You isolate 0.673 grams NaCl, 0.982 grams SiO2, and 0.384 grams CaCO3. What is the percent recovery for each of the compounds? Round your answer to 2 decimal places.

Typical atmospheric pressure in Phoenix is 730 mm Hg. Convert this value to (a) atmospheres; (b) psi.

Complete and balance all of the equations for double displacement reactions below. Indicate all gases with (g) or T. precipitates with (s) or ↓, and soluble compounds with (aq). Write "NR" next to the equation if none takes place, (c) ammonium chloride + sodium nitrate

Be sure to answer all parts. The temperature of a 0.50-L gas sample at 25°C and 1.00 atm is changed to each of the following temperatures. What is the final pressure of the system? The volume and the number of gas particles are constant. a. 70.°C atm b. 300.°C atm

How hot must the air in a balloon be heated if initially it has a volume of 700. L at 20°C and the final volume must be 1,360. L? The balloon is sealed so that the pressure and number of air particles are constant. K

An unknown amount of gas occupies 32.5 L at 4.71 atm and 298 K. How many moles does the sample contain? What is the mass if the gas is helium? What is the mass if the gas is argon? mol If the gas is helium: If the gas is argon: g

Given the following reactants: KBr + Al2(SO4)3 Ⓡ a) State the the type of reaction (If there is no reaction, write no reaction, explain why and stop here). b) Predict the products and write the complete balanced equation. If you're unable to balance, still write the unbalanced skeleton equation. Use --> for the arrow.

Be sure to answer all parts. A sample of helium gas has a volume of 2.0 L at a pressure of 4.0 atm. What is the volume of gas at each of the following pressures? The temperature and the number of gas particles do not change. a. 5.3 atm L b. 11.2 atm

Consider the formaldehyde (CH₂O) molecule. What is the central atom? Enter its chemical symbol. How many lone pairs are around the central atom? 0 What is the ideal angle between the carbon-hydrogen 0 bonds? Compared to the ideal angle, you would expect the actual angle between the carbon-hydrogen bonds to be...

Which section of the Constitution outlines the structure of the legislative branch of government? A. The Preamble B. Article I C. Article III D. Article II

Which among the following receptors respond to hot and cold temperatures? Chemoreceptors Mechanoreceptors Pain receptors Thermoreceptors

The empirical formula of a compound is NO₂. Its molecular mass is 46 amu. What is the molecular formula of the compound? Select the correct answer below: NO₂ NO N₂O4 N408

When a sample is placed in the NMR machine, The majority of magnetic fields of all protons present align with the magnetic field of the machine, and a small percentage aligns against the field of the machine. The entirety of magnetic fields of protons present align with the magnetic field of the machine. The entirety of magnetic fields of protons aligns against the magnetic field of the machine. The minority of magnetic fields of all protons present align with the magnetic field of the machine, and a large percentage aligns against the field of the machine.

A 20.0 g sample of a hydrocarbon is found to contain 2.86 g hydrogen. What is the percent by mass of carbon in the hydrocarbon? Select the correct answer below: 85.7% carbon 14.3% carbon 50.0% carbon 61.8% carbon

What does the law of definite proportions state? Select the correct answer below: All samples of a pure compound contain the same elements in the same proportion by mass. When two elements react to form more than one compound, a fixed mass of one element will react with masses of the other element in a ratio of small, whole numbers. For every action there is an equal and opposite reaction. The total energy of the universe is constant.

If we compare a mole of carbon atoms to a mole of oxygen atoms, which sample will contain more atoms? Select the correct answer below: the carbon sample the oxygen sample they will contain the same number of atoms impossible to tell |||

What was Jacob Riis's goal in the late 1800s? to expose corruption in city governments to start settlement houses for the less fortunate to preach a gospel of social justice for the less fortunate to make Americans aware of problems in cities

What is the empirical formula of dimethyl sulfide, a compound with a cabbage- like odor that is produced by marine plankton, which is 38.7% carbon, 9.70% hydrogen and 51.6% sulfur by mass? Select the correct answer below: C₂H S CHS CH₂S CH S

Which is a difference between molecular compounds and ionic compounds? Select the correct answer below: Molecular compounds typically form between a metal and a nonmetal, while ionic compounds typically form between nonmetals. Molecular compounds result from the transfer of electrons between atoms to form ions, while ionic compounds result from the sharing of electrons between neutral atoms. Molecular compounds are formed of discrete, neutral atoms, while ionic compounds are formed of large repeating arrays of opposite charges. Molecular compounds have high melting points and high boiling points, while ionic compounds are typicaly found as gases or low-melting solids and low-boiling liquids.

Which is NOT a property common to ionic compounds? Select the correct answer below: In solid form ionic compounds are not electrically conductive. Most ionic compounds are liquids. Most ionic compounds have very high boiling points. lonic compounds are electrically conductive in the molten state.

A 10.0 g sample of a compound is found to contain 1.00 g carbon, 0.840 g hydrogen, and 8.16 g chlorine. What is the compound's percent composition? Select the correct answer below: 19.4% carbon, 31.9% hydrogen, 48.7% chlorine 51.0% carbon, 22.7% hydrogen, 26.3% chlorine 1.00% carbon, 0.840% hydrogen, 8.16% chlorine 10.0% carbon, 8.40% hydrogen, 81.6% chlorine

The tires on an off-road bike are inflated to 36 psi. Convert this value to (a) atmospheres; (b) mm Hg.

2. Draw the reaction-energy diagram for the addition of HBr to 3-methyl-1,2-pentadiene. Make sure to show both possible pathways the reaction may undergo. Fill in the structures of reactants, intermediates and products on the diagram. Brieflty explain the differences in the pathways.

What is NOT true about molecular compounds? Select the correct answer below: They are also called covalent compounds. They are typically formed between nonmetals. They result when atoms transfer electrons to form ions. They typically exist as gases, low-boiling liquids, and low-melting solids.

10. Starting from benzene, provide a reasonable synthesis scheme to produce each of the following compounds. Make sure to include any necessary reagents and intermediates. DO NOT DRAW THE MECHANISMS HERE.

How many moles of air are present in the lungs if they occupy a volume of 4.7 L at 37°C and 743 mm Hg? How many molecules of air does this correspond to?

Be sure to answer all parts. Calculate the volume of each substance at STP. a. 4.8 mol Ar L b. 1.3 g CO₂ L

5. Write the condensed (or line-angle) structural formula for the following compounds: a. 2,2-dimethyl-1-propanamine b. 4-methyl-2-pentanamine c. N-isopropyl-2-butanamine d. 2-bromoaniline e. N-cyclohexylethanamide f. benzamide g. N-methylhexanamide h. N-butyl,N-methylpropanamide

A sample of a compound is 30.9% Na, 21.5% O, and 47.6% Cl by mass. What is the empirical formula of this compound? Select the correct answer below:

If a plastic container at 2.0°C and 750. mm Hg is heated in a microwave oven to 95°C, what is the pressure inside the container (in mmHg)? mm Hg

Convert both values in the blood pressure reading 130/90 to atmospheres. 130 mm Hg = 90 mm Hg = atm atm

The following excerpt is taken from The Scarlet Letter. Do the words explain the narrator's reaction to the letter "A." "It seemed to me then, that I experienced a sensation not altogether physical, yet almost so, as of burning heat, and as if the letter was not of red cloth, but red-hot iron. I shuddered, and involuntarily let it fall upon the floor." Which among the following ideas is explicitly stated in the given lines? Letter A is used as a means to humiliate sinner... The narrator is made to feel guilty for her sin. Letter A is Imprinted on the narrator's body. Letter A is voluntarily worn by the narrator.

Enter your answer in the provided box. A volume (39.0 L) of gas at 52 K is heated to 520 K. What volume does the gas (in Liters) now occupy? (The pressure and the number of particles do not change.)

2. Draw the molecular orbital energy diagram for: N₂²+ (strong s-p interaction) Label all energy levels (atomic and molecular orbitals). Give the electron configuration, bond order, and state the magnetic properties

Which of the following statements is/are true? a) To convert from one resonance structure to another, only electrons can be moved. b) of the possible bonds between nitrogen atoms, a double bond is stronger than a triple bond. c) A non-polar bond will form between two identical atoms of equal electronegativity.

What is the molecular formula of a compound that contains 10.0 g carbon, 1.68 g hydrogen, and 13.4 g oxygen? The molar mass of this compound is 180.0 g/mol.

Carefully look over the collection of everyday products in the room. Record the names of organic compounds you see listed. Common names are often used instead of IUPAC names on product labels. Even so, some of the prefixes and suffixes should be recognizable.

Sodium acetate is used in commercial hand-warming "hot packs". Its chemical formula is NaC₂H₂O₂. What is the formula mass of sodium acetate? Select the correct answer below: 52.011 amu 91.101 amu 82.034 amu 70.023 amu F

If two molecules have the same structural formula, what is true about them? Select the correct answer below: They have the same molecular formula. They have different molecular formulas. They have different empirical formulas. Their atoms are connected differently.

When benzene is treated with methyl chloride and aluminum trichloride under conditions that favor trialkylation, one major product is obtained.

Enter your answer in the provided box. The combustion of coal with oxygen forms CO₂ and releases 94 kcal of energy. C(s) + O₂(g) → CO₂(g) How much energy is released when 4.3 mol of O₂ reacts? ΔH = -94 kcal/mol kcal of energy released Report answer to appropriate number of significant figures.

Given that 4 NH3 + 5 O2 → 4 N+ 6 H₂O, if 3.00 mol NH3 were made to react with excess of oxygen gas, the amount of H2formed would be: 3.5 moles 5.4 moles 4.5 moles 6.00 moles 2.5 moles