What is the empirical formula for a molecule containing 46.8% si and 53.2% o?

0.09 moles of sodium sulfate in 12 ml of solution

Does the number of ions in solution increase, decrease, or remain constant? it continuously decreases. it continuously increases. it decreases at first, then increases. it increases at first, then decreases.

Which type of intermolecular attractions holds ammonia molecules together with other ammonia molecules?