Chapter 8, Problem 22P

The density of platinum is 21.45 x 103 kg/m3. a. Calculate the volume (in m3/atom) occupied per platinum atom b. Estimate the atomic diameter (in m);(The estimate uses the approximation that it is a cubic volume) c. Using this estimation, calculate the thickness of a metal foil (in m) containing 2.0 x 101 atomic layers of platinum.

Sulfur compounds cause “off-odors” in wine, so winemakers want to know the odor threshold, the lowest concentration of a compound that the human nose can detect. The odor threshold for dimethyl sulfide (DMS) in trained wine tasters is about 25 micrograms per liter of wine (μg/l). The untrained noses of consumers may be less sensitive, however. Here are the DMS odor thresholds for 10 untrained students: 31   31    43    36    23    34    32    30    20    24 Assume that the standard deviation of the odor threshold for untrained noses is known to be σ = 7 μg/l. The first condition of inference requires the 10 untrained students represent a simple random sample from all untrained consumers. This is not likely but we choose to believe so. The second condition requires the distribution of the thresholds for untrained noses is not too far from a normal distribution. Given the following stem plot, the second condition is also satisified. 2|0343|0112464|3   Give a 95% confidence interval for…

What is Hydrogen Bonding? Explain with an example?