One of the phosphorus oxides has Mr 220. The composition contains 56.4% by mass of phosphorus. Determine its molecular formula. (ArP = 31)

It is important to wear proper protective equipment in lab even when not actively performing experiments because accidents can affect any researcher, even one not working on an experiment. select the best answer from the choices provided

According to each substances heat of fusion, which of the items below requires more heat to be added per gram of substance to go from solid to liquid? silver sulfur water lead

Which element is the least metallic between cadmium, silver, zinc, or iron?