Question

The mole fraction of solute in a solution is 0.3 . The mole percent of solvent is:

• A. $30$
• B. $70$
• C. $60$
• D. $40$

Answer 1

The correct option is B $70$

Mole fraction of solvent $=1-$ mole fraction of solute

$=1-0.3=0.7$

$\because$ Mole percent $={\chi }_a\times 100$

$\therefore$ Mole percent of solvent $=0.7\times 100$

So, mole percent is 70%.