Organic Chemistry practice. 3. Base your answer to the following question on the information below and on your knowledge of chemistry.

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1 Organic hemistry practice Period: Name: Date: 1. Given the formula: What is a chemical name of this compound? A. propane. propanal. propanol D. propanone 3. ase your answer to the following question on the The table below contains selected information about chlorine and two compounds containing chlorine. One piece of information is missing for each of the substances in the table. hlorine and Two ompounds ontaining hlorine Name Formula Molar Mass Phase at STP ( g mol ) chlorine l 2 71? calcium chloride al 2? solid 1, 2-dichloroethene? 97 liquid The liquid compound has an empirical formula of Hl. Write the molecular formula for this compound. 2. Given the equation representing a reaction: 4. ase your answer to the following question on the Which type of reaction is represented by this equation? The equation below represents the reaction between 2-methylpropene and hydrogen chloride gas. A. addition. esterification. polymerization D. substitution Explain, in terms of chemical bonds, why the hydrocarbon is unsaturated. page 1

2 5. Identify the class of organic compounds to which the product belongs. 10. What is the name of the compound with the formula H 3 H 2 H 2 NH 2? A. 1-propanol. 1-propanamine. propanal D. propanamide 6. ase your answer to the following question on the Diethyl ether is used as a laboratory and industrial solvent. The boiling point of diethyl ether at standard pressure is The equation below represents a reaction that produces diethyl ether. Identify the element in diethyl ether that allows it to be classified as an organic compound. 11. Which compound is an isomer of 2 H 5 O 2 H 5? A. H 3 OOH. 2 H 5 OOH 3. 3 H 7 OH 3 D. 4 H 9 OH 7. State the number of electrons shared between the carbon atoms in one molecule of the organic reactant. 8. State why the reaction is classified as a synthesis reaction. 12. Ethanoic acid and 1-butanol can react to produce water and a compound classified as an A. aldehyde. amide. ester D. ether 9. Draw a structural formula for an isomer of the product that has the same functional group. Period: page 2 Organic hemistry practice

3 13. Given the formula representing a molecule: Which statement explains why the molecule is nonpolar? A. Electrons are shared between the carbon atoms and the hydrogen atoms.. Electrons are transferred from the carbon atoms to the hydrogen atoms.. The distribution of charge in the molecule is symmetrical. 16. ase your answer to the following question on the A test tube contains a sample of solid stearic acid, an organic acid. oth the sample and the test tube have a temperature of The stearic acid melts after the test tube is placed in a beaker with 320. grams of water at The temperature of the liquid stearic acid and water in the beaker reaches Identify the element in stearic acid that makes it an organic compound. D. The distribution of charge in the molecule is asymmetrical. 17. ase your answer to the following question on the 14. Which compound is classified as an ether? A. H 3 HO. H 3 OH 3. H 3 OH 3 D. H 3 OOH 3 Fruit growers in Florida protect oranges when the temperature is near freezing by spraying water on them. It is the freezing of the water that protects the oranges from frost damage. When H 2 O(l) at 0 changes to H 2 O(s) at 0, heat energy is released. This energy helps to prevent the temperature inside the orange from dropping below freezing, which could damage the fruit. After harvesting, oranges can be exposed to ethene gas, 2 H 4, to improve their color. Write the empirical formula for ethene. 15. ase your answer to the following question on the The equation below represents a chemical reaction at 1 atm and 298 K. 2H 2 (g) + O 2 (g) 2H 2 O(g) State the change in energy that occurs in order to break the bonds in the hydrogen molecules. 18. Explain, in terms of bonding, why the hydrocarbon ethene is classified as unsaturated. Period: page 3 Organic hemistry practice

4 19. Determine the gram-formula mass of ethene. 23. Given the formula representing a compound: What is the IUPA name of this compound? A. 2-chloroheptane. 6-chloroheptane 20. Which formula represents an alkane?. 2,2-dichloroheptane D. 6,6-dichloroheptane A. 2 H 2. 2 H 4. 3 H 4 D. 3 H Which term represents a chemical reaction? A. deposition. combustion 24. Given the formulas representing two compounds at standard pressure:. sublimation D. vaporization 1 propanol Methyl ethyl ether The compounds can be differentiated by their A. boiling points. gram-formula masses 22. Which type of reaction includes esterification and polymerization?. numbers of hydrogen atoms D. percent compositions by mass of carbon A. decomposition. neutralization. organic D. nuclear Period: page 4 Organic hemistry practice

5 25. ase your answer to the following question on the A solution of ethylene glycol and water can be used as the coolant in an engine-cooling system. The ethylene glycol concentration in a coolant solution is often given as percent by volume. For example, 100. ml of a coolant solution that is 40.% ethylene glycol by volume contains 40. ml of ethylene glycol diluted with enough water to produce a total volume of 100. ml. The graph below shows the freezing point of coolants that have different ethylene glycol concentrations. 26. ase your answer to the following question on the Molecules containing two carbon atoms and a functional group have many home and industrial uses. These compounds can be produced by a variety of reactions, as shown by the equations below. Equation 1: Equation 2: Equation 3: 2 H 4 + H 2 O H 3 H 2 OH 2H 3 H 2 OH + O 2 2H 3 HO + 2H 2 O 2H 3 HO + O 2 2H 3 OOH Explain, in terms of bonding, why the hydrocarbon reactant in equation 1 is unsaturated. 27. Draw a structural formula of the ethanal molecule in equation 2. Explain, in terms of the molecular polarity, why ethylene glycol dissolves in water to form a solution. 28. Explain, in terms of atoms, why H 3 H 2 OH and H 3 HO are not isomers of each other. 29. Identify the class of organic compounds to which the product in equation 3 belongs. Period: page 5 Organic hemistry practice

6 30. At STP, graphite and diamond are two solid forms of carbon. Which statement explains why these two forms of carbon differ in hardness? A. Graphite and diamond have different ionic radii.. Graphite and diamond have different molecular structures.. Graphite is a metal, but diamond is a nonmetal. D. Graphite is a good conductor of electricity, but diamond is a poor conductor of electricity. 33. ase your answer on the information below and on your knowledge of The equation below represents a reaction between propene and hydrogen bromide. yclopropane, an isomer of propene, has a boiling point of 33 at standard pressure and is represented by the formula below. Explain why this reaction can be classified as a synthesis reaction. 31. Given the formula representing a compound: What is an IUPA name for this compound? A. ethyl propanoate. propyl ethanoate 34. Identify the class of organic compounds to which the product of this reaction belongs.. 3-hexanone D. 4-hexanone 32. What is the empirical formula for 6 H 12? 35. Explain, in terms of molecular formulas and structural formulas, why cyclopropane is an isomer of propene. Period: page 6 Organic hemistry practice

7 36. Which element has atoms that can bond with each other to form ring, chain, and network structures? A. aluminum. calcium 40. Which hydrocarbon is saturated? A. 2 H 2. 3 H 4. 4 H 6 D. 4 H 10. carbon D. argon 37. What is the number of electrons shared in the multiple carbon-carbon bond in one molecule of 1-pentyne? 41. Given the formula for an organic compound: A D. 8 What is the name given to the group in the box? 38. utanal, butanone, and diethyl ether have different properties because the molecules of each compound differ in their A. butyl. ethyl. methyl D. propyl A. numbers of carbon atoms. numbers of oxygen atoms. types of functional groups D. types of radioactive isotopes 42. Which type of organic reaction produces both water and carbon dioxide? 39. Which formula represents a nonpolar molecule containing polar covalent bonds? A.. A. addition. combustion. esterification D. fermentation. D. Period: page 7 Organic hemistry practice

8 43. ase your answer to the following question on the The unique odors and flavors of many fruits are primarily due to small quantities of a certain class of organic compounds. The equation below represents the production of one of these compounds. State the class of organic compounds to which product 1 belongs. Period: page 8 Organic hemistry practice

9 Problem-Attic format version c EducAide Software Licensed for use by Ethel Khanis Terms of Use at Period: Organic hemistry practice 4/10/ D 3. 2 H 2 l Example answer: The hydrocarbon has a double carbon-carbon bond. More H atoms could be bonded with this hydrocarbon. halocarbons carbon Example answer: The reaction has two reactants that become one product. Two substances form one. [answer varies] Example answer: Ethene is classified as an unsaturated hydrocarbon because each molecule contains a double bond. 28 g/mol D A Water molecules and ethylene glycol molecules are both polar. Two carbons share four electrons D Example answer: Energy is absorbed when bonds are broken. carbon 17. H They don t have the same number of H atoms. Acids 32. H Example answer: Two substances react to produce one substance. Example answer: halide

10 Teacher s Key Page Example answer: The molecular formulas for the two compounds are the same, but the structural formulas are different. A D ester