Chemistry, asked by shamsmohammed72, 1 year ago

Benzene contains 92.3 % carbon and its relative molecular mass is 78 find the percentage of hydrogen in benzene. What is the ratio of moles of carbon atoms and hydrogen atoms in benzene? Also calculate its empirical and molecular formula

Answers

Answered by aqibshaikh

If it is 92.3% carbon it means 7.7% hydrogen.
since these adds upto 100℅ one can change it to grams.

once this done change to moles dividing by a molecular mass.
C= 7.7 moles and H= 7.7 moles.

The ratio of the compound must be 1:1

C H is an emperical formula.

Take the empirical formula and divide this into the given atomic mass that is 78.

It will be 6

Now, multiply empirical formula with 6.

You will get C6H6

aqibshaikh: you can ask me here if u have any queries regarding this question

shamsmohammed72: 'once this done change to moles dividing by a molecular mass.
C= 7.7 moles and H= 7.7 moles.' IF YOU COULD KINDLY SHOW THE STEPS

aqibshaikh: u know the molecular masses of C and H

shamsmohammed72: if you could kindly privide the answer mentioned below

shamsmohammed72: if hydrogen and oxygen combine in a ratio 1:8 by mass respectively to form water molecule.explain how many moles of water will be formed using 10 moles of hydrogen gas and 5 moles of oxygen gas

shamsmohammed72: 1)how many moles of oxygen are there in So2

2)how many moles of oxygen are there in 2 gm of So2

3)how many moles of oxygen are there in 1 mole of So2

shamsmohammed72: sorry not this

shamsmohammed72: 1)how many moles of oxygen are there in So2

2)how many moles of oxygen are there in 2 gm of So2

3)how many moles of oxygen are there in 1 mole of So2

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