The Acme Company manufactures widgets. The distribution of widget weights is bell-shaped. The widget weights have a mean of 40 ounces and a standard deviation of 9 ounces. Use the Empirical Rule, find a) 99.7% of the widget weights lie between and b) What percentage of the widget weights lie between 22 and 67 ounces? % c) What percentage of the widget weights lie below 49 ? %

Fluorine is so reactive that it forms compounds with materials inert to other treatments. When 0.622 g of platinum is heated in fluorine, 0.985 g of a dark red, volatile solid forms.

When 0.378 g of this red solid reacts with 0.161 g xenon gas, 0.539 g of an orange-yellow solid forms. What is the empirical formula of this product, the first to contain a noble gas?

Fluorine is so reactive that it forms compounds with materials inert to other treatments. When 0.622 g of platinum is heated in fluorine, 0.985 g of a dark red, volatile solid forms.

When 0.378 g of this red solid reacts with 0.161 g xenon gas, 0.539 g of an orange-yellow solid forms. What is the empirical formula of this product, the first to contain a noble gas?

The most common experimental technique to perform elemental analysis is combustion analysis, where a sample is burned in a large excess of oxygen and the combustion products are trapped in a variety of ways. A 99.99% pure, 0.4831 g sample containing only carbon, hydrogen, and nitrogen is subjected to combustion analysis, resulting in the formation of 1.353 g CO2, 0.2750 g H2O, and 0.1833 g NO. What is the empirical formula of the sample?

Combustion of a 0.9827-g sample of a compound containing only carbon, hydrogen, and oxygen produced 1.900 g of CO2 and 1.070 g of H2O. What is the empirical formula of the compound?   

Of the choices below, which would be the best for the lining of a tank intended for use in storage of hydrochloric acid? Explain your reasoning.                                                   (2)

A) copper

B) zinc

C) nickel

D) iron

E) tin

Answer the questions completely with complete calculations.

1. How many grams of a sample of NaNO3 should be dissolved in a 150.0 mL of water to give a 0.22 M solution?

2. A certain alcohol contains only three elements C, H & O. Combustion of 50.00 g sample of the alcohol produced 95.50 g of CO2 and 58.70 g of H2O. What is the empirical formula of the alcohol?

1) Define competitive advantage (CA).  

2) Distinguish CA carefully from sustainable CA (SCA).  

3) How much more common is CA than SCA and why?  

4) Return to Ghemawat’s reading in module 1: put my last question into an empirical context – how sustainable is CA generally?  

5) What implications does all this have for executive strategy?

Assume that you were hired by a government to advise it on the design of its tax system. Discuss some factors that would be relevant to the advice that you would give. In your answer, discuss how different desirable factors might tradeoff with each other. What empirical factors would you want to learn about since they would be crucial in affecting the advice that you would give?

Scores of an IQ test have a​ bell-shaped distribution with a mean of

100100 and a standard deviation of1919.

Use the empirical rule to determine the following.

​(a) What percentage of people has an IQ score between 6262 and138138​?

​(b) What percentage of people has an IQ score less than4343or greater than157157​?

​(c) What percentage of people has an IQ score greater than 138138​?

1. A local agriculture producer had a wheat yield last year of 72 bushels per acre. The producer had an unusually productive year. The normal wheat yield on this particular farm is 38 bushels per acre with a variance (σ²) of 16 bushels per acre.

1. What is the probability that the wheat yield this year will be within one standard deviation (±) of the mean? Hint: think Empirical Rule.