A compound is found to contain 2.270 % hydrogen, 34.80 % phosphorus, and 62.93 % oxygen by mass. What is the empirical formula for this compound

The 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 H= 2.270 g

Mass of P = 34.80 g

Mass of O = 62.93 g

Step 1 : convert given masses into moles

Moles of H =  

Moles of P =  

Moles of O =

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

For H =  

For P=    

For O =  

The simples ratio will be = H: P : O= 4: 2: 7

Hence the empirical formula is

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