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Q. The number of oxygen atoms present in 1 mole of oxalic acid dihydrate is

Some Basic Concepts of Chemistry

Solution:

One molecule of oxalic acid dihydrate $(COOH)_2\cdot 2H_2O$ contains $6 $ oxygen atoms.
Number of oxygen atoms in $1$ mole $= 6 \times 6.023 \times 10^{23}$
$ = 36.13 \times 10^{23}$ atoms