What do you need to adjust to balance a chemical equation

Si una estrella no tiene paralaje medible, ¿qué puedes inferir?

Which formula can be used to calculate the molar mass of hydrogen peroxide

Ammonium perchlorate nh4clo4 is the solid rocket fuel used by the u.s. space shuttle. it reacts with itself to produce nitrogen gas n2 , chlorine gas cl2 , oxygen gas o2 , water h2o , and a great deal of energy. what mass of nitrogen gas is produced by the reaction of 2.1g of ammonium perchlorate?