What is the difference between soap and detergent?
a. The total mass of carbon contained in fossil fuels that was burned in the world from 1750 to 2000 was estimated to be 2.5 x E14 kg C. The amount of carbon released as carbon dioxide from agricultural expansion and deforestation over this period is estimated to be 1.3 x E14 kg C. The concentration of carbon dioxide in the atmo ...continues
Environmental Chemistry Problem
Assume that algae need carbon, nitrogen and phosphorus in the atomic ratio 106:16:1. What is the limiting nutrient in the lake that contains the following concentrations: total carbon = 20 mg/L, total N = 0.80 mg/L and total P = 0.16 mg/L? If it is known that half the phosphorus in the lake originates from the use of phosphate ...continues
What is the mass, in milligrams, of mercury in 1.00 kg lake trout that just meets the Northern American standard of 0.50 ppm Hg? What mass of fish, at the 0.50-ppm level, would you have to eat to ingest a total of 100 mg of mercury?
Calculating the amount of dissolved oxygen in water using Henry's Law
I am trying to calculate the amount of oxygen that will dissolve in regular water as a function of temperature in units of mg/L. So I guess I'm trying to find the equilibrium concentration vs. the saturation concentration. First, I do not seem to be able to find Henry's Law Constants for other than 25 degrees C, and the prob ...continues
I have theorized....and actually have no idea if I am correct....but am trying to determine that if I chemically react certain wood-borne volatile organic acids with sodium carbonate (Na2CO3) and form respective sodium methanoate, ethanoate, benzoate etc. etc. compounds ---- and now if I subjected these sodium methanoate and eth ...continues
WHAT MASS OF WATER CAN BE HEATED FROM 5.5 DEGREES C TO 55.O DEGREES C BY 9.09 x 10 to the tenth power J of heat?
The specific heat of aluminum is 0.902 J g-1 C-1 at 25 C. How much heat, in kJ, does it take to raise the temperature of a 12.0 g chunk of aluminum from 15.5 C to 35.5 C? A. 0.216 kJ B. 0.0108 kJ C. 0.0180 kj D. 240 kJ E. 216 kJ
Calcium carbide (CaC2) reacts with water to form acetylene (C2H2), a gas used as a fuel in welding: CaC2 + 2H2O ==> C2H2 + Ca(OH)2 ^H = 128.0 kJ How many kilograms of CaC2 are consumed in a raction that releases 3.64 x 104 kJ of heat under these conditions? A. 1.82 x 10 to the power of 4 kg B. 284 jg C. -18.2 kg D ...continues
If a 10.0 g sample of Zn (s) is treated with excess HCl, what volume of hydrogen gas is evolved at STP? Zn + 2HCl --> ZnCl2 + H2 A. 7.36 L B. 6.85 L C. 347 L D. 146 L E. 3.43 L
