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  4. If the cost of 360 g of glucose ( C 6 H 12 O 6) is Rs 60, then the cost of glucose per mole is Rs.

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Q. If the cost of $360\, g$ of glucose $\left( C _{6} H _{12} O _{6}\right)$ is Rs $60$, then the cost of glucose per mole is Rs_______.

Some Basic Concepts of Chemistry

Solution:

Number of moles $=\frac{\text { Mass of a substance }}{\text { Molar mass of a substance }}$
$=\frac{360\, g }{180\, g\, mol ^{-1}}=2\, mol$
Now, $2$ mol of glucose cost $= Rs\, 60$
$\therefore 1$ mol of glucose cost $= Rs\, 30$