An old 0. 500 l lecture bottle of triethylamine (n(ch₂ch₃)₃) was found in a lab and needed for a synthesis reaction. A pressure regulator indicated a pressure of 25. 0 psi, and the lab was at room temperature (25. 0°c). What mass of vaporized triethylamine in grams was left in the lecture bottle?.

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.