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Question

How many moles are represented by 100 g of glucose, C6H12O6 ? (C = 12 u, H = 1 u, O = 16 u)

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Solution

Mass of glucose = 100g
Molar mass of glucose = (6 × 12) + (12 × 1) + (6 × 16) = 180g
1 mole of glucose = 180g
Or, 180g of glucose = 1 mole of glucose
Therefore, 100g of glucose = 100 / 180 moles = 0.55 moles
Hence, 100g of glucose contain 0.55 moles.

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