Use a proportion or dimensional analysis to determine the amount of energy (in kJ) needed to ionize 7.5 mol of sodium (Na(g) + 496 kJ →Na+(g) + e–).

What is the empirical formula of vanadium 1 oxide given that 20.38 grams of vandium combines with oxygen to form 23.58 grams of the oxide

Silver tarnishes as silver metal reacts with hydrogen sulfide, h2s, in the air. in this reaction, dark silver sulfide, au2s, covers the surface of silver. when silver is polished, this coating of silver sulfide can be removed from the surface. this makes the silver shiny again. enter the coefficients that balance the tarnishing reaction equation. (type 1 for no coefficient.)

How would the number of moles (n) of o2 change if the atmospheric pressure doubled but all other variables stayed the same