Saturday
October 25, 2014

Search: rainwater

Number of results: 31

Chemistry (Acids and Bases)
The natural pH of rainwater is 5.6. The acidity of rainwater is caused by the dissolution of (TRUE OR FALSE) boric acid sulfuric acid carbonic acid calcium carbonate calcium oxide nitric acid
March 20, 2011 by Andy

Chemistry
Due to increased CO2 in the atmosphere, the pH of rainwater is more acidic than in the previous century. Use the following data to calculate the pH of unpolluted rainwater at 25C: vol% in air of CO2 = 0.033; solubility of CO2 in pure water at 25C and 1 atm = 88 mL CO2 per ...
April 12, 2011 by Josh

chemistry
Due to increased CO2 in the atmosphere, the pH of rainwater is more acidic than in the previous century. Use the following data to calculate the pH of unpolluted rainwater at 25C: vol% in air of CO2 = 0.033; solubility of CO2 in pure water at 25C and 1 atm = 88 mL CO2 per ...
April 11, 2011 by jerry

math
who makes rainwater mix with dirt?
March 9, 2010 by aleah

rainwater
What would cause rain water puddle to turn black in color
June 19, 2011 by todd

C H E M I S T R Y !
A sample of rain in an area with severe air pollution has a pH OF 3.5. What is the pOH of this rainwater?
March 4, 2013 by Lauren J.

science
How does the pH of rainwater vary throughout the United States in Texas, California , Pennsylvania Kansas , Massachusetts and, Washington ? thank you
September 29, 2010 by jen

science
Infiltration is the process by which rainwater becomes; A. Saltwater B. River water C. Ground water D. Ocean water
November 25, 2013 by someone

College Chemistry II
What is the pH of rainwater at 30C in which atmospheric Co2 has dissolved, producing a constant [H2Co3] of 1.40x10^-5 M? Take into account the auto ionization of water. Im very confused on how to even start this problem
August 10, 2014 by Monica

biology
during the downpour in a village,the rainwater carried away excess of nitrogenous and other compounds present in the soil to a pond.how will they affect the growth of algae and phyloplankton in the pond?
August 14, 2014 by Tina

math
A rainwater collection tank is shaped like a cylinder with a diameter of 4 ft and a height of 6 ft. What is its volume? Use 3.14 for pi. A. 15 units^2 B. 20 units^2 C. 30 units^2 D. 62 units^2
May 1, 2013 by Anonymous

College Chemisty
The pH of water collected in a stormwater run-off downstream from a Union Carbide chemical factory is 4.82. Calculate the H+ ion concentration of rainwater. The problem may start with: pH= -log H+ = 4.82. The answer is 1.5x10 power -5. Again, Can you please show steps for maths.
October 22, 2010 by Elleni

Chemistry
The average pH of precipitation in rural areas is 5.70. Assuming that the pH
is controlled by the carbonate system, i.e., no anthropogenic acid gases are present 
in the atmosphere, calculate the amount of calcium carbonate (mg) dissolved per liter 
of ...
April 13, 2010 by Anonymous

Geometry
An engineer designed a 620 ft long water canal to drain a rainwater detention pond. It is to have a trapezoid cross-section that is 8 ft deep, 15 ft across the bottom, with walls sloping outward at an angle of 40. (a)Calculate the volume of earth that needs to be ...
October 12, 2011 by Anil

chemistry
A particular coal contains 2.55% sulfur by mass. When the coal is burned, it produces SO2 emissions which combine with rainwater to produce sulfuric acid. Determine how much sulfuric acid (in metric tons) is produced by the combustion of 1.1 metric ton of this coal. (A metric ...
June 23, 2010 by Cynthia

chem
A particular coal contains 2.55% sulfur by mass. When the coal is burned, it produces SO2 emissions which combine with rainwater to produce sulfuric acid. Determine how much sulfuric acid (in metric tons) is produced by the combustion of 1.1 metric ton of this coal. (A metric ...
October 1, 2007 by DD

PHYSICS
What causes acid rain? Can you think of a way acid rain could be produced even without industrial pollution? [Hint: Plants produce carbon dioxide, Co2, which reacts with rainwater to produce bicarbonate ions, HCO 3-.] Give one reaction that produces acid rain using industrial ...
November 30, 2012 by Aaa

Math
2 part question 1) a cone shaped paper cup has a height of 7 inches and a diameter of 5 inches. What is the volume of the cone? Round answer to the nearest hundredth. 2) if we collect rainwater in the cup in question 1 until the waters depth is 6 inches, what percentage of the...
May 22, 2012 by Rosie

chemistry
1)you have a glass of pure water. are chemical reactions occurring in the water ?if so, what are they?if not explain why not. 2)while investigation the effects of acid rain in your area, you discover a lake that is surprisingly resistant to changes in pH caused by acid rain. ...
August 23, 2011 by sam

business law
Liability to Business invitees. John went to Lisa's Market to pick up a few items for dinner. It was a rainy, windy day, and the wind had blown water through the door of Lisa's Market each time the opened. As john entered through the door, he slipped and fell in the ...
November 7, 2010 by eddie

Chemistry Help?
30, A: One atmospheric compound is responsible (after it has dissolved in water) for both the general acidity of normal rainwater and the acidity of much soil. What is this compound? 30, B: Is this compound put into the atmosphere solely by pollution? 30, C: Why doesnt this ...
May 13, 2009 by T. White

biology
You are conducting an experiment to determine whether lichen populations are affected by local airborne pollutants. Which of the following observations would best support your hypothesis that high levels of pollutants in rainwater cause a reduction in lichen abundance: it's ...
November 8, 2008 by Anonymous

Chemistry (URGENT)
I have a test soon. If you can help me with these questions, that would be great. 1. Define and describe the following. a)Alkaline - metal - base b)Corrosive - burn/eat away - acid c)Caustic - harsh - both? (acid + base) d)Low pH - 0-6.99 - acid Please check my answers and ...
March 3, 2010 by John

Engineering
You want to water your garden with rainwater, and you place a 55 gal drum at the bottom of the downspout of your house gutter system to collect the water. The drum is 42" tall and you cut a 1 inch diameter hole at the lowest point of the side of the drum to install your outlet...
September 10, 2006 by matt

Water
One way is to collect rain. Another way is to erect cone shaped metal objects on which water will condense at night and run into a container. There probably are more esoteric systems but this should get you sarted. If you don't have any machines or modern day tecnology and you...
November 15, 2006 by DrBob222

Bus 13-Principals of Management (community College
How is a case study written? I have to write a 3-4 page case study on the following: With annual revenue of $430 billion, 2 million employees, and 7,300 stores worldwide (and even larger numbers by the time you read this), Wal-Mart is the largest company in the world and has ...
June 29, 2011 by Dawn

CHEM
A particular coal contains 2.55% sulfur by mass. When the coal is burned, it produces SO2 emissions which combine with rainwater to produce sulfuric acid. Determine how much sulfuric acid (in metric tons) is produced by the combustion of 1.1 metric ton of this coal. (A metric ...
October 1, 2007 by DD

Statistics
Emissions of sulfur dioxide by industry set off chemical changes in the atmosphere that result in "acid rain." The acidity of liquids is measured by pH on a scale of 0 to 14. Distilled water has pH 7.0, and lower pH values indicate acidity. Normal rain is somewhat acidic, so ...
September 10, 2013 by moose

Maths
Hi, I'm sure I'm doing something wrong here, I'm coming up with an exorbant amount of rainfall for ONE ROOF in a school. Somehow I don't think that in a drought-prone area it is feasable to expect the following to be true. I am unsure where I'm going wrong but its BUGGING me ...
May 7, 2011 by URGENT help plz plz plz plz

Math - doing something wrong somewhere
Hi, I'm sure I'm doing something wrong here, I'm coming up with an exorbant amount of rainfall for ONE ROOF in a school. Somehow I don't think that in a drought-prone area it is feasable to expect the following to be true. I am unsure where I'm going wrong but its BUGGING me ...
May 7, 2011 by URGENT help plz plz plz plz

Earth science
Please go over my answers and tell me what I got wrong... Telling me the correct answer would also be nice please hurry I only have 20 mins What does the principle of uniformitarianism tell us about the past? (Points: 5) The past is the key to the future. X The present is the...
January 29, 2010 by Ario

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