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25 gm of Oleum sample required 2 gm of water ,find out the % labelling of sample .

SOLUTION: :  25 gm oleum required 2 gm water
                       1 gm require …………. 2/25 gm water
                      100 gm require ……..2/25x100=8 gm
                  Hence % labelling is 108%

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