How many moles are in 37.5 g nitrogen

Idon’t know how to solve this question

If a polyatomic ionic compound has gained two hydrogen ions, then how does its name begin?

Need ! asap will mark 10 pts using the room temperature line (orange line) and your periodic table, make lists that identify the state of matter (gas, liquid, or solid) in which each element you plotted exists at room temperature. explain your answers