Higher/A level chemistry enthalpy of combustion PLEASE HELP I AM LITERALLY DESPERATE

Balance this equation: n2 + h2 > nh3, write the following molar ratios: n2 / n2 / nh3 h2 /

If a solution had a ph of 7 what is the solution

Select all of the statements which are true. electrons are located in shells or orbits around the atom. electrons orbit slowly around the atom. electrons travel in one flat path around the nucleus of an atom. the valence of an atom is determined by the number of electrons in the atom's outermost shell.