A closed gas system initially has a pressure and volume of 729 torr and 245 L with the temperature unknown. If the same closed system has values of 770 torr, 189 L and 163
K, what was the initial temperature in K?

The electromagnetic force acts between what

What are scientists who study fossils called? ( a ) astronomers. ( b ) biologists. ( c ) geologists. ( d ) paleontologists.

Consider the following reactions. (note: (s) = solid, (l) = liquid, and (g) = gas.) mg(s) + ½o2(g) → mgo(s) + 146 kcal/mole h2(g) + ½o2(g) → h2o(g), δh = -57.82 kcal/mole what type of reaction is represented by the previous two examples?