How many grams of oxygen are required to burn 3.01 x 10^23 propane molecules?

Which statement is true about this reaction? 14n+1h 15o it is a practical source of energy on earth. it occurs only outside the solar system. its product is heavier than each of its reactants. it shows the critical mass of an element.

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.

Which process describes vaporization that takes place below the surface of a liquid? condensation melting boiling evaporation