Question

Find the %composition of various elements present in the following compounds
CO2, C 6 H 12 O 6, NaOH

IF U GIVE ME CORRECT ANS I WILL MAKE UR ANS BRAINLY

Answer 1

Answer:

Calculate % composition of all elements in sodium carbonate

(Na  2 CO  3

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Formula: Na2CO3

Na Molecular Mass: 22.98 grams

C Molecular Mass= 12.01 grams

O Molecular Mass= 16 grams

Now, the molecular mass of the compound: 2(22.98) + 12.01 + 3(16)= 105.97 grams

Now, when you do percent composition all you are doing is this: Amount of Element in Grams/ Total Compound Mass in Grams x 100%.

So, lets do that for each of these elements:

Na:  

105.97

2×22.98

​

×100%=43.37%  

C:  

105.97

12.01

​

×100%=11.33%  

O:  

105.97

3×16

​

×100%=45.30%  

Now,  add up these percentages and make sure that they add up to exactly 100%.

43.37% + 11.33% + 45.30%= 100.00 %

Explanation: