Question

A 0.930-g sample of ascorbic acid (vitamin C) was dissolved in95.0g of water. The concentration of ascorbic acid,as determined by freezing-pointdepression,was 0.0555 m. What is the molecular mass of ascorbic acid?

Answer 1

Moles of water $=\frac{95}{18.01}=5.27$

Molecular mass of ascorbic acid $=\frac{0.930}{5.27}=0.163$