Salicylic acid, used in the synthesis of as- pirin, has mass composition 60.87% c, 4.38% h, and 34.75% o. what is the empirical for- mula of the compound?

Empirical formula is

Explanation:

If percentage are given then we are taking total mass is 100 grams.

So, the mass of each element is equal to the percentage given.

Mass of C= 60.87 g

Mas of H = 4.38 g

Mass of O = 34.75 g

Step 1 : convert given masses into moles.

Mass of C =

Moles of H =

Moles of O=

Step 2 : For the mole ratio, divide each value of moles by the smallest number of moles calculated.

For C =

For H =

For O =

The ratio of C:H:O= 2 : 2: 1

Hence the empirical formula is

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