Question

an organic compound was found to contain the following constituents carbon 33.8 percent hydrogen 4.7% nitrogen 13.2% chlorine 33.4 percent and the rest is Oxygen determine its empirical formula​

Answer 1

First,consider you have 100 grams of this compound (it is just for getting more comfortable in calculations)

So this 100 grams contain 72.7 grams carbon then divide this number with its mole>>>72.2/12=6

For H 6.1 grams (like previous step) >>> 6.1/1=6.1

For N 21.2 grams >>> 21.2/14=1.5

Now we write it in new form,C6 H6.1 N1.5

What we did was calculating mole number that presents in 100 grams of compound

Last step is, simplifying C6 H6.1 N1.5, we should divide these numbers to one number in order to obtain a number that is simplest form

In this case we should divide this number to 1.5

(C4  H4 N1 )

By simplest form i mean,there should be 1 in numbers of atoms(here N)

If it was,C6 H6.1 N3 then we divide that to 3

Then we get C2 H2 N1

By this calculation we get experiment formula

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