A certain mass of water was heated with 31,750 calories, raising its temperature from 22.0°C to 28.5 °C. Find the mass of water. (specific heat of water = 1.00 cal/g°C)

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 mass of oxygen gas is consumed in a reaction that produces 4.60mol so2

How many grams are in 68.2 molecules of br2?