Escribe el símbolo, el grupo y el período de cada uno de los elementos siguientes: yodo, calcio, aluminio, hierro, plomo, carbono, hidrógeno, criptón, oro y helio.

Molarity is moles of solute over liters of solution. idk if that is what you are talking about, but you can convert moles of solute to grams of solute using dimensional analyzes by using molar mass found on the periodic table.

Polyethylene is a strong synthetic polymer that can be used to make toys and bottles. this makes plastics which are important also to people but sometimes it lead to harmful environmental effects such as global warming if these plastics are burned.