Choose the one alternative that best completes the statement or answers the ques
ID: 973161 • Letter: C
Question
Choose the one alternative that best completes the statement or answers the question. Which of the following is true of nonane, C_9H_20. which has a density of 0.79 g/mL, melts at -51 1)_____degree C, and boils at 157 degree C? Nonane does not undergo combustion. Nonane is soluble in water. Nonane floats on the surface of water. Nonane is a solid at room temperature. Nonane is a gas at room temperature. What is the name for a two-carbon alkyl group? methyl ethyl pentyl butyl propyl A hydrocarbon contains only the elements carbon, hydrogen and oxygen. hydrogen and oxygen. carbon and hydrogen. Carbon, hydrogen, and nitrogen. carbon and oxygen. The reactants needed to produce the compound chlorocyclopentane are cyclopentene and HCl. cyclopentene and Cl_2. pentene and Cl_2. pentene and HCl. cyclopentane and Cl_2. An unsaturated compound always contains a double bond. is a cycloalkane. is aromatic. contains at least one double or triple bond. contains a trip bond.Explanation / Answer
A. Does nonane not undergo combustion?. NO. nonane DOES undergo combustion
B. Is nonane soluble in water? NO. like dissolves like. nonane is NONpolar
C. Does nonane float on the surface of water? YES. it is less dense that H2O
D.Is nonane a gas at room temperature? NO. it is a liquid
E. Is nonane solid at room temperature? NO. it is a liquid
So the right answer is C.
Reason: From the info that you've provided, we know that nonane will float on water since its density is less than water (density of water = 1,0 g/mL). The hydrophobic nature of nonane, a hydrocarbon, means that it will not mix with water. Its 157 degree bp is much hotter than room temperature, therefore it is not a gas at rt. Nonane is a hydrocarbon, therefore, it will undergo combustion. And its -51 degree mp means that it will be melted at room tempertature.