An organic compound is composed of 38.7% c, 9.70% h, 51.6% o. the compound has a molecular formula mass of 62.0g/mol. what is the molecular formula of this organic compound? a) cho b) c2h6o2 c) c4h6o4 d) c4h12o4

B)

Explanation:

First you should add up the three percentages:

Then you take that base of 100g to calculate the mass of each element:

Then you find the number of moles of each element using the molar mass of each one:

- For C:

- For H:

- For O:

Then, you find the minimum number of moles and divide each one by it:

- For C:

- For H:

- For O:

You have find the proportion of each element in the compound that is , but you should find the molecular formula taking in account the molar mass of the compound, so:

So the molecular formula is

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