Question

A body drinks $500mL$ of $9\%$ glucose solution. The number of glucose molecules he has consumed is :[Molecular weight of glucose= $180$]

• A. $0.5\times {10}^{23}$
• B. $1.0\times {10}^{23}$
• C. $1.5\times {10}^{23}$
• D. $2.0\times {10}^{23}$

Answer 1

The correct option is C $1.5\times {10}^{23}$

According to given conditions,
$Glucosein500mLsolution=\frac{9\times 500}{100}$
$=45g$
$=\frac{45}{180}=0.25mol$
$=0.25\times 6.02\times {10}^{23}molecules$
$=1.5\times {10}^{23}molecule$