Hydrogen is used as a rocket fuel because it is very light and reacts explosively and completely with oxygen. What is the likely magnitude of the equilibrium constant k for the combustion reaction? 2 h2(g) + o2(g) ⇄ 2 h2o(g).

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.

Which of the following does the reading test of the sat ask you to do ?

What gpa will you get if you make all a's and 1 b?