The equation below represents a chemical reaction at 1 atm and 298 K.
Identify the change in energy that occurs in order to break the bonds in the hydrogen molecules.
2H2 (g) + O2 (g) --> 2H2) (g)
1. Endothermic and absorbed
2. Exothermic and released
3.Endothermic and released
4.Exothermic and absorbed

Nitrogen (n), phosphorus (p), and potassium (k) are the main nutrients in plant fertilizers. according to an industry convention, the numbers on the label refer to the mass percents of n, p2o5, and k2o, in that order. calculate the n: p: k ratio of a 30: 10: 10 fertilizer in terms of moles of each element, and express it as x: y: 1.0.

If 90.0 grams of ethane reacted with excess chlorine, how many grams of dicarbon hexachloride would form

Amap that uses a range of colors and shading to represent the elevation, depth, or landscape of specific features on earth is a/an map.