Calculating the average number of air molecules at a specific altitude and atmospheric temperature.

At an altitude of 55.00 km, the average atmospheric temperature is essentially 0 degrees C. What is the average number of air molecules per cubic centimeter of air at this altitude? Hint: Solve the equation for the pressure as a function of height and temperature and from this use the ideal gas equation to calculate the volume of air.

Wet Limestone Process

Assume that the wet limestone process requires 1 metric ton of calcium carbonate to remove +35.0% of the sulfur from 4 metric tons of coal containing +4.0% S. Assume that the sulfur product is calcium sulfate. Calculate the percentage of the limestone(calcium carbonate) converted to calcium sulfate.

Help with a solving a problem and it's implications after solving.

One of the impacts of fossil fuels is an increase in acid deposition (or acid rain as many people refer to it). The following exercise asks you to calculate how much lime (an alkaline rock, not the tasty green fruit) it would take to increase the pH of a small lake. Consider a small lake in the Adirondack region of New York state; Lake Whatchamacallit (surface area = 4 mi2, average depth = 42 ft). The pH of Lake Whatchamacallit has been measured to be 4.0 (an unfortunate result of acid deposition), which is just a little too acidic to support aquatic life; i.e. Lake Whatchamacallit is for all intents and purposes, dead. Farmer Jones, whose property adjoins the lake, knows that when t... click for more

Calculating the ppm of ozone in the air.

If the volume fraction of ozone in the air of a city is 5x10-7, what is the ppm of ozone in the air?

Aquatic Chemistry

Problem 1. Carbon sequestration technologies are being actively explored by researchers as methods to remove CO2 from the atmosphere, thereby diminishing the greenhouse effect. The most popular repository for CO2 is considered to be the deep ocean, where the CO2 would theoretically be isolated from the atmosphere for thousands of years. Incorporation of CO2 into phytoplankton is one approach that has been considered carefully. In some such scenarios, certain iron-poor regions of the ocean would be fertilized with iron, inducing phytoplankton to grow and take up CO2 for conversion into biomass. When the microbes were to die, their shells would ideally sink to the floor. Diatoms, planktonic... click for more