What is the empirical formula for the compound H4O2?

Ionic compounds are made of ions, and yet the overall charge of an ionic compound is neutral. why?

Acontainer holds 35.8 moles of gas under 10.0 atm of pressure at 70.0 c. what is the volume of the container?

How many liters of oxygen gas, at standard temperature and pressure, will react with 35.8 grams of iron metal? 4 fe (s) + 3 o₂ (g) → 2 fe₂o₃ (s)