F. Arjun purchased 250 g of glucose (C6 H12O6 ) for Rs 40. Find the cost of glucose per mole

Given : cost for 250 g glucose = Rs 40  , formula of glucose = C₆H₁₂O₆ 

To find : cost of glucose per mole

solution:

molecular formula of glucose = C₆H₁₂O₆  

\(\therefore\) molecular mass of glucose = (6× atomic mass of C)+(12× atomic mass of H) +(6× atomic mass of O)

=(6×12u)+(12×1u)+(6×16u)

=180 u 

n(number of moles ) = \(Mass \over molar\space mass \) 

=\(250\over180\) 

=1.39 mol 

price of 1.39 mol is 40 rupees , therefore for 1 mol

price for 1 mol of glucose  = \(40\times 1\over 1.39\) = 28.8 Rupees

\(\therefore\) cost per mol of glucose is 28.8 Rs