The half life of hydrogen-3 is approximately 12 years. in how many years will half life of a 20 gram sample decay by beta radiation to helium-3?

Llama have 74 chromosomes how many chromosomes will they be found in their gametes explain how you know

Which statement best explains the relationship between an area is geography and the temperature of its surface water

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 .