The standard heat of combustion of ethanol, c2h5oh, is 1372 kj/mol ethanol. How much heat (in kj) would be liberated by completely burning a 20. 0 g sample?.

Determine the empirical formula of a compound containing 40.6 grams of carbon, 5.1 grams of hydrogen, and 54.2 grams of oxygen. in an experiment, the molar mass of the compound was determined to be 118.084 g/mol. what is the molecular formula of the compound? for both questions, show your work or explain how you determined the formulas by giving specific values used in calculations.

What is the atomic number of an atom that has 6 protons

Describe the forces both attractive and repulsive that occur as two atoms move closer together.