Textbook Question
Determine the formula weights of each of the following compounds: e. benzaldehyde, C6H5CHO, the molecule largely responsible for the odor of almond extract.
2. Atoms & Elements
Calculating Molar Mass
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A condensation reaction involving 200 glucose molecules, C6H12O6, results in a polysaccharide. What is the molar mass, in g/mol, of the polysaccharide, assuming complete reaction and loss of water molecules?
A
35964 g/mol
B
35880 g/mol
C
36018 g/mol
D
36000 g/mol
Verified step by step guidance1
Understand that a condensation reaction between glucose molecules results in the formation of a polysaccharide and the loss of water molecules (H2O). Each linkage between glucose units results in the loss of one water molecule.
Calculate the molar mass of a single glucose molecule, C6H12O6. The molar mass is the sum of the atomic masses of all the atoms in the molecule: 6 carbon atoms, 12 hydrogen atoms, and 6 oxygen atoms.
Determine the number of water molecules lost in the formation of the polysaccharide. Since 200 glucose molecules are involved, and each linkage results in the loss of one water molecule, the number of water molecules lost is 199 (since the first glucose molecule does not lose a water molecule).
Calculate the total molar mass of the polysaccharide by multiplying the molar mass of a single glucose molecule by 200, then subtracting the molar mass of the water molecules lost (199 times the molar mass of H2O).
Compare the calculated molar mass of the polysaccharide with the given options to determine the correct answer.
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