Help please!! * Describe in words the chemical reaction represented by the symbol equation: H2(g) + O2(g) ⟶
⟶H2O (l)

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?

How many moles is 14.5 cm^3 of platinum? the density of platinum is 21.45 g/cm^3.

How are evaporation and sublimation similar? a both involve the formation of a gas. b both release energy to the surroundings. c both take place throughout a solid. d both take place at the surface of a liquid.