General organic chemistry Questions and Answers

Hydrocarbons are compounds that contain only C and H atoms. When a hydrocarbon reacts with O₂, CO₂ and H₂O are formed. Write a balanced equation for the combustion of the following hydrocarbon, a high-octane component of gasoline. Do not include states of maver in your answer. C6H, (benzene)

A compound has a molecular weight of 318.31 g/mol and an empirical formula of C10 H7O2. What is the molecular formula? Select the correct answer below: C20 H1404 C₂H1003 C10 H702 none of the above

Which musical form originated in Italy around 1520 A.D.? The madrigal The galliard The passamezzo Word painting

Diatomic N2 can react with diatomic H2 to form ammonia (NH3). The balanced chemical equation is: N2 + 3 H2-2 NH3 If 6 moles of H2 totally reacted with more than enough N2, how many moles of ammonia would be expected to form? 5 moles 3 moles 6 moles 4 moles 2 moles

Suppose two chemical reactions are linked together in a way that the O₂ produced in the first reaction goes on to react completely with Mg to form MgO in the second reaction. Reaction one: 2 KCIO3 → 3 O2 + 2 KCI Reaction two: 2 Mg + O₂ → 2 MgO If you start with 4 moles of KCIO3, how many moles of MgO could eventually form? 12.0 moles 3.0 moles 6.0 moles 2.0 moles 4.0 moles

What is the formula mass of a compound with 2 carbon atoms and 3 oxygen atoms, in atomic mass units?

What is the limiting reactant for the following reaction given we have 3.4 moles of Ca(NO3)2 and 2.4 moles of Li3PO4? Reaction: 3Ca(NO3)2 + 2Li3PO4 → 6LINO3 + Ca3(PO4)2 LINO3 CA3(PO4)2 Ca(NO3)2 Li3PO4

In comparing a balloon containing 25 grams of helium to a balloon containing 25 grams of neon, which one of the following statements is TRUE? Each balloon has an equal number of atoms. The helium balloon has more atoms. This scenario cannot happen because gases have no mass. The neon balloon has more atoms.

A 17.10 g compound is made up of 5.900 g N and 11.20 g C. What is the percent composition of carbon in this compound? • Your answer should have four significant figures.

Which of the following equations is NOT balanced properly? 4NH3 + 1402 → 4NO2 + 6H₂O Cr₂(SO4)3 +6KOH → 2Cr(OH)3 + 3 K2SO4 2NaHCO3 → Na2CO3 + CO2 + H₂O 2Cr + 6HCI →→2CrCl3 + 3H2

What is the formula mass of a compound with 2 aluminum atoms, 3 sulfur atoms, and 3 oxygen atoms, in atomic mass units?

What types of elements are predominantly present in the periodic table? Metalloids Metals Nonmetals Nonmetals and metalloids

How many moles of lithium nitrate are theoretically produced if we start with 3.4 moles of Ca(NO3)2 and 2.4 moles of Li3PO4? Reaction: 3Ca(NO3)2 + 2Li3PO4 →6LINO3 + Ca3(PO4)2 6.8 8.1 7.2 2.8 1.2

Nitrogen dioxide, NO₂, also an undesired product formed during combustion, is converted to N₂ and O₂ in a catalytic converter. Write a balanced equation for this reaction.

Consider the balanced equation of KI reacting with Pb(NO3)2 to form a precipitate. 2 KI (aq) + Pb(NO3)2 (aq) → PbI₂ (s) + 2 KNO3(aq) What mass of PbI₂ can be formed by adding 0.537 L of a 0.329 M solution of KI to a solution of excess Pb(NO3)2?

Given the balanced equation CO₂ + Si → SiO2 + C, if you were to react 1 mole of CO2 with 1 mole of Si, which statement is TRUE? The SiO₂ is the limiting reactant. The CO₂ is the limiting reactant. The Si is the limiting reactant. You have equal stoichiometric amounts of reactants.

Using molarity to find solute moles and solution volume A chemist adds 140.0 mL of a 0.49 mol/L aluminum chloride (AICI) solution to a reaction flask. Calculate the millimoles of aluminum chloride the chemist has added to the flask. Be sure your answer has the correct number of significant digits.

Which of the following Renaissance compositions provides an excellent example of word painting? The Kyrie from Glovannie Pierluigi da Palestrina's Pope Marcellus Mass Successores by Hildegarde of Bingen The Terpsichore collection by Michael Praetorious The madrigal "As Venus Was Descending" by Thomas Weelkes

Balance the equation for the formation of magnesium hydroxide [Mg(OH)₂], one of the active ingredients in milk of magnesia. Do not include states of matter in your answer. MgCl₂ + NaOH → Mg(OH)₂ + NaCl

Question 10 Contrast these characteristics to determine which styles it is referring to; music, acting, poetry, dance, scenery, costumes in a theatrical performance versus large-scale composition for chorus, vocal soloists, orchestra, set to a narrative text but have no acting, scenery, or costumes. Points 2 Opera versus Cantata Opera versus Oratorio Oratorio versus Cantata Oratorio versus Suite Complete Later Complete

As a result of free-radical mono-halogenation of alkanes, one of the (A) of alkane is (B) by a (C). A: hydrogens B: eliminated C: halogen atom. A: hydrogens B: substituted C: halogen atom. A: halogens B: substituted C: hydrogen atom. A: halogens B: eliminated C: hydrogen atom.

Question 4 Define Mass Points 1 A monophonic choral composition made up of five sections: the Kyrle, Gloria, Credo, Sanctus, and Agnus Dek A monophonic choral composition made up of five sections: the Kyrie, Gloria, MissaSolemnis, Sanctus, and Agnus Del. A polyphonic choral composition made up of five sections: the Kyrie, MissaSolemnis, Credo, Sanctus, and Agnus Del. A polyphonic choral composition made up of five sections: the Kyrie, Gloria, Credo, Sanctus, and Agnus

Enter your answer in the provided box. Use the balanced equation for the reaction of N, and O₂ to form NO to answer the question. N₂(g) + O₂(g) →→→ 2 NO(g) How many moles of O₂ are needed to completely react with 6.1 moles of N₂? mol O₂

Zinc-silver oxide batteries are used in cameras and hearing aids. Identify the species that is oxidized and the species that is reduced in the following redox reaction. Identify the oxidizing agent and the reducing agent. Oxide (02) is unchanged in this reaction. Zn + Ag₂O → ZnO + 2 Ag Zn: (select) Ag: (select) (select) (select)

Which statement below concerning the photoelectric effect is true? View Available Hint(s) Increasing the intensity (amplitude) of the light shining on a metal surface is sufficient to cause the emission of electrons from a metal surface. A threshold wavelength exists for each metal, and only light of a longer wavelength than this threshold causes electrons to be emitted from the metal surface. Joy A threshold frequency exists for each metal, and only light of a frequency higher than this threshold causes electrons to be emitted from the metal surface. Light with a frequency below the threshold frequency can still cause electrons to be emitted from the metal surface, but a lag time occurs while sufficient energy to dislodge the electrons builds up.

Which literary device(s) would be best to include as part of a literary analysis of this excerpt from "The Lady or the Tiger"? A. The device of understatement, which several times in the text and supports the theme B. The device of imagery, which several times in the text and supports the theme C. The device of onomateopia, which occurs once in the text and does not support the theme

Which description below is accurate about event during the initiation step for free-radical halogenation of alkanes? During the initiation step, the C-H bond in some alkane molecules is broken heterolitically, resulting from exposing the mixture of the reactants to light. During the initiation step, the bond in some halogen molecules is broken homolitically, resulting from exposing the mixture of the reactants to light. During the initiation step, the bond in some halogen molecules is broken heterolytically, resulting from exposing the mixture of the reactants to light. During the initiation step, the C-H bond in some alkane molecules is broken homolitically, resulting from exposing the mixture of the reactants to light.

Which evidence belongs in body. paragraph #2? A. Ironically, Nicholas finds that "the older, wiser, and better people" were always in error (Saki 1). B. A humorous tone is apparent with words like "seemingly frivolous" & "quite uninteresting" (Saki 2). C. Saki uses imagery when a tapestry is "glowing in wonderful colors beneath a layer of dust" (Saki 4).

The specific rotation of enantiomer A is 7.9º. A mixture of enantiomer A and A'(the enantiomer of A) is subjected to polarimetry and an observed rotation of 2.1° is obtained, what is the %Composition for this mixture? 63.3% A' and 36.7% A 63.3% A and 36.7% A' 50% A and 50% A' 30% A' and 70% A

10 Nicholas' aunt calls out to him in desperation, "I've been looking for you in the gooseberry garde and I've slipped into the rain- water tank ... the sides are slippery and I can't get out" in hopes of procuring his assistance (Saki 4). A. Passage #1 B. Passage #2 C. Passage #3 D. Passage #4

What is one advantage of using fossil fuels? A. They are more reliable than other sources of energy. B. They produce fewer pollutants than other fuels. C. There is an unlimited supply of fossil fuels. D. They are relatively inexpensive.

Which of the following DNA duplex will melt at higher temperature? A) GGGAAATTT CCCTTTAAA B) GGGGGGTTT CCCGGGAAA A and B will not melt at all. A and B will melt at same temperature A will melt at higher temperature B will melt at higher temperature

If one pure enantiomer rotates the plane-polarized light 117.6° in the clockwise direction, then a pure sample of its non-superimposable mirror image will rotate it -117.6 -62.4 62,4 117.6

The specific rotation of enantiomer A is -87.3º. A mixture of enantiomer A and A'(the enantiomer of A) is subjected to polarimetry and an observed rotation of 34.2° is obtained, what is the %EE for this mixture? 39.2% A 60.8% A 39.2% A' 60.8% A

A dextrorotatory enantiomer Is also of R configuration. Is also of S configuration. Rotates the propagation plane of polarized light in clockwise fashion. Is also of- configuration.

Select the correct answer. How does a catalyst speed up a chemical reaction? A. by lowering the activation energy B. by lowering the AH of the reaction C. by raising the energy of the products D. by raising the energy of the reactants

Question 8 of 25 What can be said about a reaction with AH= 620 kJ/mol and AS = -0.46 kJ/(mol-K)? A. It is never spontaneous. B. It is always spontaneous. C. It is spontaneous above 1347 K. D. It is spontaneous at 298 K.

What information does the latent heat of vaporization give? A. The energy needed to completely vaporize a mole of a liquid B. The energy needed to heat a liquid from freezing point to boiling point C. The energy needed to raise the temperature of 1 g of a vapor 1°C D. The energy needed to completely melt a mole of a solid

What makes ocean breezes blow toward land by day? A. The ocean water has more currents in it. B. The ocean warms more slowly than the land. C. The ocean warms more quickly than the land. D. The ocean waves create the breezes.

A rocket is designed to drop its first stage mid-flight. Due to a malfunction, this does not occur. What is a possible result of this malfunction? A. The rocket is now too heavy to reach its destination. B. Rocket stages will drop. C. Thrust will increase. D. The specific impulse will increase.

Why do your feet burn when you walk across beach sand on a sunny summer day? A. Heat is transferred by radiation warming. B. Heat is transferred by frictional heating. C. Heat is transferred by thermal conduction. D. Heat is transferred by convection heating.

Two scientists come to different conclusions about an experiment. What should be done to settle their disagreement? A. One of the scientists should change his or her conclusion. B. They should have a debate. C. More experiments should be performed. D. People should assume the older scientist is correct.

Which of the following is a primary source? A. An encyclopedia entry B. A scientific paper C. A magazine article D. A news report on the Internet

The combustion reactions that occur in the engines of a rocket lead to pressure gradients that cause the gaseous products to rush out of the rocket into the atmosphere. What is created by this process? A. Thermodynamics B. Fuel efficiency C. Thrust D. Decreasing entropy

How does a scientist critique another scientist's conclusions? A. By ignoring the first scientist's data B. By performing more experiments C. By criticizing the scientist's personal beliefs D. By reading secondary sources

You read a primary source and a secondary source that discuss the same experiment. There is a difference in the conclusions made by these two sources. Which should you trust more, and why? A. The primary source, because it was written by the researcher B. The primary source, because it contains more charts C. The secondary source, because it is easier to understand D. The secondary source, because it was printed on paper

People breathe in oxygen molecules from the air and exhale carbon dioxide molecules. Because of this, the air is full of carbon dioxide and oxygen mixed together. What is this an example of? A. An increase in entropy B. An increase in oxidation reactions C. An increase in enthalpy D. An increase in evaporation

For which of the reactions listed below will Gibbs free energy always be positive? A. An endothermic reaction that increases in entropy B. An exothermic reaction that decreases in entropy C. An exothermic reaction that increases in entropy D. An endothermic reaction that decreases in entropy

A chemist must prepare 500. mL of 445. mM aqueous aluminum sulfate (Al₂(SO4)₂) working solution. He'll do this by pouring out some 0.975 M aqueous aluminum sulfate stock solution into a graduated cylinder and diluting it with distilled water. Calculate the volume in mL of the aluminum sulfate stock solution that the chemist should pour out. Be sure your answer has the correct number of significant digits. ?

What causes radiation heating? A. Heat transfer through electromagnetic waves B. Heat transfer through differences in temperatures C. Heat transfer through moving gases or liquids D. Heat transfer through contact between molecules