What greek letter are used in the precise definition of a limit?

Which formula can be used to calculate the molar mass of ammonia (nh3)? molar mass of n + molar mass of h 3 × molar mass of n + molar mass of h molar mass of n + 3 × molar mass of h 3 × molar mass of n + 3 × molar mass of h

How many moles of carbon dioxide will form if 2.5 moles of c3h8 is burned

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