0.28 M Ca(NO3)2
Express your answer using two significant figures.

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?

What is the density, d, of a substance with a volume of v = 12.5 cm3 and a mass of m = 74.4 g ?

How to balance an unbalanced equation