Chemistry, 27.07.2019 18:30, taleiayarbough2940
Why isn't carbon-14 dating accurate for estimating the age of materials older than 50,000 years?
Answers: 1
Chemistry, 21.06.2019 17:00, aeverettpdzrvo
The most efficient way to establish the best possible economizer position is to measure
Answers: 1
Chemistry, 22.06.2019 17:30, llamasking
Observation and experimentation have led many scientists to accept a theory about the origin of the universe. this theory is called the big bang theory. scientific evidence collected and observed by scientists around the world suggests that the universe is ever expanding from a hot and dense initial state. what makes this a scientific theory? (2 points)
Answers: 2
Chemistry, 22.06.2019 20:00, 20calzoy
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) β c2h2 (g) + caoh2 (s) =Ξ΄hβ414.kj in the second step, acetylene, carbon dioxide and water react to form acrylic acid: 6c2h2 (g) + 3co2 (g) + 4h2o (g) β 5ch2chco2h (g) =Ξ΄h132.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 .
Answers: 3
Why isn't carbon-14 dating accurate for estimating the age of materials older than 50,000 years?...
Mathematics, 27.03.2020 03:53
Mathematics, 27.03.2020 03:53
Mathematics, 27.03.2020 03:53