General organic chemistry Questions and Answers

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

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

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.

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:

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)

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

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?

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

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.

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)

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

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.

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.

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.

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.

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?

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

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.

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

Fats, such as butter, and oils, such as corn oil, are formed from compounds called fatty acids, one of which is linolenic acid (C18H300₂). Linolenic acid undergoes reactions with hydrogen and oxygen to form the products shown in each equation. [1] C18H30 0₂ + H₂ → C18H3602 linjenic acid [2] C18H300₂ + O₂ CO₂ + H₂O linolenic acid a. Balance Equation [1], which shows the reaction with hydrogen. b. How many grams of product are formed from 87.0 g of linolenic acid in Equation [1]? C18H360₂

Capsaicin is an irritant found in chili peppers that produces a burning sensation. Its chemical formula is C18H27NO3. What is the molecular mass of capsaicin? Select the correct answer below: 43.037 amu 288.011 amu 382.382 amu 305.418 amu

How many moles are contained in each number of grams of fructose (C6H1206, molar mass 180.2 g/mol), a carbohydrate that is about twice as sweet as table sugar? "Lite" food products use half as much fructose as table sugar to achieve the same sweet taste, but with fewer calories. Enter your answer in scientific notation. a. 12.0 g b. 0.0630 g

The reaction of magnesium metal (Mg) with oxygen (O₂) forms MgO. Write a balanced equation for this redox reaction. Write two half reactions to show how many electrons are gained or lost by each species. Redox Reaction: Oxidation Reaction: Reduction Reaction: -→>

"So I opened it--you cannot imagine how stealthily, stealthily-until, at length a single dim ray, like the thread of the spider, shot from out the crevice and fell full upon the vulture eye." What things are compared in the line above? 4 Ray of light and the thread of spider Feeble movement of the narrator and the vulture eye Movement of the old man and the vulture eye Movement of the spider and the vulture eye