26. Diazepam is the addictive tranquili2 plest formula is CHNOCL Calculate the mass percent of each element in this compound. 27 Deer ticks are known to cause Lyme disease. The presence of DEET (di ethyltoluamide) in insect repellents protects the user from the ticks. The mo- lecular formula for DEET is CHpNO. How many grams of carbon can be obtained from 127 g of DEET? 28. Allicin is responsible for the distinctive taste and odor of garlic. Its sim- ple formula is CHpOS. How many grams of sulfur can be obtained from 25.0 g of allicin? 29. A tablet of Tylenol has a mass of 0.61l g. It contains 251 mg of its ac- tive ingredient, acetaminophen, CH,NO (a) What is the mass percent of acetaminophen in a tablet of Tylenol? (b) Assume that all the nitrogen in the tablet is in the acetaminophen. How many grams of nitrogen are present in a tablet of Tylenol? 30 The active ingredient in some antiperspirants is aluminum chlorohy drate, Al2(OH) Cl. Analysis of a 2.000-g sample of antiperspirant yields 0.334 g of aluminum. What percent (by mass) of aluminum chlorohydrate is pres- ent in the antiperspirant? (Assume that there are no other compounds con- taining aluminum in the antiperspirant.) 31. Combustion analysis of 1.00 g of the male sex hormone, testosterone, yields 2.90 g of CO2 and 0.875 g H,O. What are the mass percents of carbon, hydrogen, and oxygen in testosterone? 32. Hexachlorophene, a compound made up of atoms of carbon, hydrogen, chlorine, and oxygen, is an ingredient in germicidal soaps. Combustion of a LO00-g sample yields 1.407 g of carbon dioxide, 0.134 g of water, and 0.523 g of chlorine gas. What are the mass percents of carbon, hydrogen, oxygen, and chlorine in hexachlorophene? 33 A compound XCl, is 70.3% (by mass) chlorine. What is the molar mass of the compound? What is the symbol and name of X? 34. A compound R,O, is 32.0% oxygen. What is the molar mass of R0? What is the element represented by R? 35 Phosphorus reacts with oxygen to produce different kinds of oxides. One of these oxides is formed when 1.347 gof phosphorus reacts with 1.744 g of oxygen. What is the simplest formula of this oxide? Name the oxide. 36. Nickel reacts with sulfur to form a sulfidn What is uming pared D Lof ad r to