Question

Moler mass of oxalic acid is 90.
Moles= mass/molar mass.
So if there are 12.6g of oxalic acid then moles should ne 12.6/90.
But it is given 12.6/126
Why

Answer 1

Answer:

it is acid so it may taking as a solution that's why molar mass changed

Answer 2

Explanation:

molar mass of of oxalic acid in aqueous solution is 2.cooh.2h2o=126g

if crystalline form, then 90 is correct

but in general, hydrate form is taken in account