Molar Mass/Molecular Mass basic chemistry question?

To find the multiplier, we say {CH4N}x = 60

OR 30x = 60 hence x = 60/30 = 2

Therefore the molecular formula is 2(CH4N) i,e C2H8N2

Saying "the molecular mass of a compound is..." is another way of saying that the sum of the atomic masses in the compound is...; in other words all atoms added together is 60. We are given the empirical formula - that's the smallest whole number ratio of the elements in the compound. The actual formula - the molecular formula - is a whole number multiple of the empirical formula. We simply need to find how many empirical formula masses combine to equal the molecular mass of 60. The mass of CH4N = 12 + 4. + 14 = 30 and 60/30 = 2....there are 2 empirical formula units in the compound.

So, 2 x (CH4N) = C2H8N2

The empirical formula is the simplest whole number ratio of atoms in a compound.

Let x=multiplier we need to obtain the molecular formula

x = molar mass / empirical formula mass

Empirical formula mass = 30 g/mol

x = 60 / 30 = 2

Multiply the subscripts in the empirical formula by two:

2(CH4N)

∴ Molecular formula is C2H8N2