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Mole Concept & Avogadro Number

Calculate the...

Question

Calculate the number of moles in 20g of glucose $(C_{6} H_{12} O_{6})$

0.42 mole

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0.63 mole

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0.11 mole

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0.5 mole

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Solution

The correct option is C 0.11 mole
$No. of moles = \frac{20}{Molar mass of Glucose}$
$M o l a r m a s s o f C_{6} H_{12} O_{6} = (12 \times 6) + (1 \times 12) + (16 \times 6) = 180 g / m o l$
$No. of moles = \frac{20}{180}$
$= \frac{1}{9} = 0.11 m o l$

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