1. Drug medications are often prescribed on the basis of bodyweight. The adult d

Question

1. Drug medications are often prescribed on the basis of bodyweight. The adult dosage of Elixophyllin, a drug used to treatasthma, is 6 mg/kg of body mass. Calculate the dose in milligramsfor a 150-lb person.

2. A pipet delivers 9.04, 9.02, 9.08, and 9.06 mL in consecutivetrials. Find the mean volume and the average deviation from themean.

Here is an Example of how to do #2
Mean volume: (10.02 mL + 10.12 mL + 10.08 mL + 10.06 mL) / 4 =10.07 mL
Individual deviations, in order: .05 mL, .05 mL, .01 mL, .01 mL
Average deviation: (.05 mL + .05 mL + .01 mL +.01 mL) / 4 = .03mL
Remember that was only an example

Explanation / Answer

(6). Density of water at 20 oC is d = 998.2kg / m ^ 3 mass of water m = 9.98 g = 9.98 * 10 ^ - 3 kg So, required volume   V = m /d                                     = 9.99799 * 10 ^ -6 m ^ 3                                     = 9.99799 cm ^ 3                                     =9.99799 mL (8). weight of the glass W = 9.203 g weight of sample   w = 141 mg = 0.141 g weight of sample + glass = W + w                                      = 9.344 g

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