solution of D-glucose in water contains carbon by weight. The molality of the solution is nearest to: (H=1, C=12, O=16)

Question

solution of D-glucose in water contains  carbon by weight. The molality of the solution is nearest to: (H=1, C=12, O=16)

Canvas Classes · Accepted Answer

Strategy:
 For a solution of glucose in water, use the mass percentage of Carbon to find the mass of glucose in the entire sample. Then, determine the mass of the solvent (water) and calculate molality as moles of solute per kg of solvent.

Step 1: Calculate mass of Carbon

Step 2: Calculate moles of D-glucose
Glucose () has 6 Carbon atoms per molecule.

Step 3: Calculate mass of water
Molar mass of glucose .
Mass of glucose .

Step 4: Calculate molality

Rounding to two decimal places gives

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