Mercedes Benz E-Class sedans are converted to limousines by a coach company. The

Question

Mercedes Benz E-Class sedans are converted to limousines by a coach company. The limousines, named Binz, come in two models, XL Six Door and XL Vis-A -Vis are available with a choice of 2 gasoline engines (a V6 or a V8) or 2 diesel engines. (a) If no other options are considered, how many different Binz limos are available? limos (b) If, in addition, 4 option packages and 14 colors are available, how many different Binz limos are available? limos This question has several parts that must be completed sequentially. If you skip a part of the question, you will not receive any points for the skipped part, and you will not be able to come back to the skipped part. Nine horses are entered in a race. In how many ways can the horses finish? Assume no ties. Biologists have identified 4 kinds of small molecules: adenine, cytosine, quanine, and thymine, which link together to form larger molecules in genes. How many 2-molecule chains can be formed if the order of linking is important and each small molecule can occur more than once in a chain? chains

Explanation / Answer

6(3) : Molality = [number of mols / solvent (kg) ] = [(305 g/62 g/mol) / 0.95 kg] = 5.17 m (option d)

7 (4) : Molarity = number of mols / V (in L)

5.63 M = [(wt/ 68 g/mol) / 0.850 L]

Weight = 302 g (option: a)

8(4) : Molefraction of solute = number of mols / total mols = (50 g/46 g/mol) / [(50/46)+(50/18)] = 0.278 (option b)

9) (4) : Mass of H2O2 = (480 g)(3/100) = 14.4 g

10)(5) Molality = [number of mols / solvent (kg) ]

1.50 = (45.5 / 58.5) / Solven weight

Solven weight = 519 g

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