Answer : The mass of carbon recovered from 769 grams of substance is 274.5 grams.
Explanation :
As we are given 35.7 % carbon by mass that means 35.7 grams of carbon present in 100 grams of substance.
Now we have to calculate the mass of carbon recovered from 769 grams of substance.
As, 100 grams of substance recovered 35.7 grams of carbon
So, 769 grams of substance recovered [tex]\frac{769}{100}\times 35.7=274.5[/tex] grams of carbon
Therefore, the mass of carbon recovered from 769 grams of substance is 274.5 grams.
