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 ...continues
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 ...continues
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?
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 o ...continues
If a piece of Calcite (Calcium Carbonate) is put into the lake, would it dissolve?
If a piece of Calcite (Calcium Carbonate) is put into the lake, would it tend to dissolve? Calcium carbonate solubility is 10^-8.35 M2, and the measured concentration of calcium ion is 0.1mM (millimolar) Information received: Lake pH=4, and total carbonate concentration of 0.001M. Carbonate Equilibria: CO2 + H20 <-> H2CO ...continues
calculate the geologic sink and source of As (arsenci) at the lake bottom assuming steady state
calculate the geologic sink and source of As (arsenic) at the lake bottom assuming steady state. Information given: A situation with an industrial input of arsenic directly into the lake at 10kg/Day. The lake volume is 1.2 x 10^8 m^3, and the average depth is 10m. The river velocities are measured as 100 L/min at both the ...continues
How many metric tons of 5%-S coal would be needed to yield the H2SO4 required to produce a 2.5-cm rainfall of pH 2.00 over an area of 100 square kilometers? This is the second time that this question has been posted. First response received was incorrect. Hints given: Calculate vol rain, mol H+, mass of S, mass of coal. ...continues
This is NOT for OTA 103846 or OTA 103997 (they have already tried this question). How many metric tons of 5%-S coal would be needed to yield the H2SO4 required to produce a 2.5-cm rainfall of pH 2.00 over an area of 100 square kilometers? This is the third time that this question has been posted. Two other responses recei ...continues
This is for OTA 104422 Ewen McLaughlin.
Here's another one for you! I use two different tutors at my school, they're both very smart but they always seem to come up with different answers - both of which are wrong! Here it is: A certain pesticide is fatal to fish fingerlings at a level of 0.5 parts per million in water. A leaking metal can containing 10.0 kg of the ...continues
