Anugget of gold with a mass of 521 g is added to 50.0 ml of water. the water level rises to a volume of 77.0 ml. what is the density of the gold?

Which atom or ion is the largest? a. k b. k+ c. ca d. ca2+ e. li

Particles vibrate in a rigid structure and do not move relative to their neighbors.

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?