Find the molecular formula of an acid with a molar mass of 98 grams per moles and the percentage composition of the elements in the acid is as such: hydrogen=2%, sulphur=33%, oxygen=65% ?
We must first find the empirical formula.
We can say that, in a
Converting to moles:
We must divide each mole number by the smallest number, which, here, is
Putting them all together, we get:
We must check if the molar mass of sulfuric acid is
So the molecular formula is also