Final answer:
The molecular formula for a polymer made by linking six glucose molecules together by dehydration reactions is C36H62O25.
Step-by-step explanation:
The molecular formula of glucose is C6H12O6. When six glucose molecules are linked by dehydration reactions to form a polymer, one water molecule (H2O) is lost per linkage. Since there are five linkage points in connecting six glucose molecules, a total of five water molecules will be lost. Therefore, the molecular formula for the resulting polymer would be calculated by multiplying the glucose formula by six and then subtracting the atoms that make up five water molecules (5 H2O gives 10 H and 5 O). The calculation is as follows:
(6 x C6H12O6) - (5 H2O)
This gives us 36 C, 72 H, and 30 O to start with before subtracting 10 H and 5 O for the water lost during the dehydration reactions:
C36H72-10O30-5
So the molecular formula for the polymer made by linking six glucose molecules together by dehydration reactions is C36H62O25.