$A$ mixture of camphor in air is an example of which type of solution?

What is the molality of a solution containing $300 \ mg$ of urea (molar mass $60 \ g/mol$) dissolved in $30 \ g$ of water (in $m$)?

The volume of water added to $500 \ mL$ of $0.5 \ M \ NaOH$ solution so that its strength becomes $10 \ mg \ mL^{-1}$ will be .......... $mL$.

$248 \ g$ of ethylene glycol $(C_2H_6O_2)$ is added to $200 \ g$ of water to prepare antifreeze. What is the molality of the resultant solution (in $m$)? $(C=12 \ u, H=1 \ u, O=16 \ u)$

The molality of a solution containing $15.20 \ g$ of urea (molar mass = $60 \ g \ mol^{-1}$) dissolved in $150 \ g$ of water is:

Define the following modes of expressing the concentration of a solution: Mass percentage,Molarity,Molality,and Mole fraction. Which of these modes are independent of temperature and why?