In 1958, the carbon dioxide level measured in Earth's atmosphere was about 315 parts per million (ppm). In 2000, the carbon dioxide level in the atmosphere had increased to about 368 ppm. What was the average annual increase in carbon dioxide in the atmosphere between 1958 and 2000 measured in ppm? What possible explanation is there for the increase in atmospheric carbon dioxide?

The graph above shows how the price of cell phones varies with the demand quantity. the equilibrium price for cell phones is where both supply and demand quantities equal $100, 5,000 5,000, $100

How many grams of aluminum will there be in 98g of al2o3?

There are two steps in the usual industrial preparation of acrylic acid, the immediate precursor of several useful plastics. in the first step, calcium carbide and water react to form acetylene and calcium hydroxide: cac2 (s) + 2h2o (g) → c2h2 (g) + caoh2 (s) =δh−414.kj in the second step, acetylene, carbon dioxide and water react to form acrylic acid: 6c2h2 (g) + 3co2 (g) + 4h2o (g) → 5ch2chco2h (g) =δh132.kj calculate the net change in enthalpy for the formation of one mole of acrylic acid from calcium carbide, water and carbon dioxide from these reactions. round your answer to the nearest kj .