Que cantidad de acido (soluto) se necesita para preparar 400ml de solución al 30% v/v​

Calculate - analysis of compound composed of iron and oxygen yields 174.86 of fe and 75.14g of o. what is the empirical formula for this compound?

When would a bouncy ball have the most potential energy

According to the vsepr theory what is the shape of a molecule that has a central atom valence three other items with no lone pairs of electrons