Description

Lipids (fats) are esters of long chain fatty acids and glycerol. Similarly, describe the general structures of proteins and carbohydrates. In other words, what are the monomers that these biological polymers are composed of?

Difference

What is the difference between soap and detergent?

If the concentration of carbon dioxide in 1750 was 260 ppm, calculate the percentage of carbon dioxide from agricultural expansion and deforestation that remained in the atmosphere over the last two and one-half centuries.

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 atmosphere in 2000 was 360 ppm, corresponding to a total mass of 7.75E14 kg C. If the concentration of carbon dioxide in 1750 was 260 ppm, calculate the percentage of carbon dioxide from these two sources that remained in the atmosphere over the two and one-half century period. (b) Plant studies indicate the net primary production (NPP) of organic carbon by photosynthesi... click for more

Calcium carbonate

The average pH of precipitation in rural areas is 5.80. 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 rainwater. pKa1=6.33, KCO2=3.388e-02

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 detergents, will banning phosphate builders slow down eutrophication? I have a test in a couple of days and this is one of the practice problems she outlined to do. A step by step answer would help me understand.