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Sergio [31]
3 years ago
14

An alcohol is 68.84 % C and 4.962 % H by mass. The rest is oxygen. What is the empirical formula of the alcohol? Enter the eleme

nts in the order C, H, and then O.
Chemistry
1 answer:
Dafna1 [17]3 years ago
8 0

The empirical formula is C₇H₆O₂.

Assume that you have 100 g of the compound.

Then you have 68.84 g C and 4.962 g H.

Mass of O = (100 – 68.84 – 4.962) g = 26.20 g O.

Now, we must convert these masses to moles and find their ratios.

From here on, I like to summarize the calculations in a table.

<u>Element</u>     <u>Mass/g</u>    <u>Moles</u>    <u>Ratio</u>    <u> ×2</u>   <u>Integers</u>  

     C           68.84      5.732    3.501  7.001       7

     H            4.962    4.923    3.006  6.012      6

     O          26.20      1.638     1          2             2

The empirical formula is C₇H₆O₂.

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