Question

a compound x contan 66.7% fo carbon and 11.1% of hydrogen and the rest being oxygen determine the emperical formula of x

Answer 1

First of all list the given before starting to solve

GIVEN:

C= 66.7%

H=11.1%

O= 100-66.7-11.1= 22.2%

In any empirical formula problem you must first find

1. the mass % of the elements in the compound. ...
2. Then change the % to grams. ...
3. Next, divide all the masses by their respective molar masses. ...
4. Pick the smallest answer of moles and divide all figures by that.

Let's start:

look u should memories the steps all to find it but if ur given the percentage already so no need to find the mass bcz in the first place we find the mass just to find the percentage.

now change the percentage we have in each element to 100grams now u would ask why 100g and not 1g well , we chose 100 bcz it's percentage and easier to calculate.

after converting all to grams

follow another formula

`n = (mass)/(molar \: mass)`

n represents number of moles

so apply to each , but for the molar mass u either should be given

H= 1 g/mol

C=12g/mol

O=16g/mol

apply it for each

HOPE U UNDERSTOOD IT