what is the name of the alcohol that would produce 2,3-dimethylbut-2-ene (figure 2) through dehydration?

When will division i requirements change? requirements change every four years requirements change every year august 2016 requirements change every other year

Class iii atmospheric hazards are those involving

In the image, layer a is the topmost layer. layer c contains fossils from the precambrian era. layer b contains dinosaur fossils, and layer a contains fossils of mammals. which two statements are supported by this evidence? 1. mammals lived before the precambrian era. 2. dinosaurs and mammals existed in the precambrian era. 3. dinosaurs evolved after precambrian organisms. 4. precambrian organisms evolved after dinosaurs. 5. precambrian organisms were the first life-forms to become fossilized, according to this sample.