How many grams of NaCl should be added to 675.55 ml of a 6.6 M solution?(Hint: first solve for moles)

Arollercoaster car at the top of a hill has potential energy kinetic energy chemical energy light energy

What is the temperature of one mole of helium gas at stp?

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?