Question

An inorganic salt have pb 62.60./. N8.4./. And o 29./. Calculate of empirical formula and molecular formula?

Answer 1

Explanation:

Let's assume we have 100 gm of that inorganic salt.

Then amount of Pb = 62.60g N= 8.4g O=29g

Let's get the number of moles

moles of Pb = 62.6/207 = 0.3

moles of N = 8.4/14 = 0.6

moles of O = 29/16 = 1.8

Now we'll look for simple ratio among them which seems to be 1:2:6

so we get our empirical formula i.e PbN2O6

empirical formula weight = 331 g

you didn't mention molecular weight.

only thing you have to do get n by

n= molecular weight/ empirical formula weight

then molecular formula = n ( empirical formula).