Concept explainers
Introduction:
Organisms are made up of carbon based molecules. Life on Earth is often considered carbon- based.
Answer to Problem 6STP
Correct answer :
The correct answer is option (C), C6H12O4.
Explanation of Solution
Explanation/justification for the correct answer:
Option (C). C6H12O4− To write the molecular formula of a compound, first we have to count the number of individual atoms of each element. These numbers are written as subscripts of each atom’s symbol. Structure of the given compound is as follows.
Number of carbon atoms= 4
Number of hydrogen atoms= 8
Number of oxygen atoms= 4
If we add two more carbon atoms, number of carbon atoms= 6
To satisfy the valency of carbon, each carbon atom will combine with 2 more hydrogen atoms. So there will be 12 hydrogen atoms. Number of oxygen atoms will remain same as 4.
Hence the new structure is as follows:
The molecular formula of this compound is C6H12O4
Explanation for incorrect answer:
Option (A). C6H8O4− Structure of the given compound is as follows.
Number of carbon atoms= 4
Number of hydrogen atoms= 8
Number of oxygen atoms= 4
If we add two more carbon atoms, number of carbon atoms= 6
To satisfy the valency of carbon, each carbon atom will combine with 2 more hydrogen atoms. So there will be 12 hydrogen atoms. Number of oxygen atoms will remain same as 4.
Hence the new structure is as follows:
The molecular formula of this compound is C6H12O4 Hence this is not the correct option.
Option (B). C6H10O6- Structure of the given compound is as follows.
Number of carbon atoms= 4
Number of hydrogen atoms= 8
Number of oxygen atoms= 4
If we add two more carbon atoms, number of carbon atoms= 6
To satisfy the valency of carbon, each carbon atom will combine with 2 more hydrogen atoms. So there will be 12 hydrogen atoms. Number of oxygen atoms will remain same as 4.
Hence the new structure is as follows:
The molecular formula of this compound is C6H12O4 Hence this is not the correct option.
Option (D).C6H12O6- Structure of the given compound is as follows.
Number of carbon atoms= 4
Number of hydrogen atoms= 8
Number of oxygen atoms= 4
If we add two more carbon atoms, number of carbon atoms= 6
To satisfy the valency of carbon, each carbon atom will combine with 2 more hydrogen atoms. So there will be 12 hydrogen atoms. Number of oxygen atoms will remain same as 4.
Hence the new structure is as follows:
The molecular formula of this compound is C6H12O4.
Hence this is not the correct option.
Chapter 8 Solutions
Biology Illinois Edition (Glencoe Science)
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