If $22 \ g$ of benzene $(C_6H_6)$ is dissolved in $122 \ g$ of carbon tetrachloride $(CCl_4)$,calculate the mass percentage of benzene. (in $\%$)

$A$ litre of seawater (which weighs $1030 \ g$) contains $6 \times 10^{-3} \ g$ of dissolved oxygen. The concentration of dissolved oxygen in $ppm$ is:

What is the density (in $g \ mL^{-1}$) of a $29\%$ (by mass) $H_2SO_4$ solution that has a molarity of $3.60 \ M$? (Molar mass of $H_2SO_4 = 98 \ g \ mol^{-1}$)

Two solutions labelled as $3 \, M \, HCl$ and $1 \, M \, HCl$ are mixed in the ratio of $x : y$ by volume and the molarity of the resulting solution is $1.5 \, M$. What is the molarity of the resulting solution if they are mixed in the ratio $y : x$ by volume?

What are the mole fraction of water and the total number of moles in a solution formed by dissolving $1$ mole of urea in $1000 \ g$ of pure water,respectively?

$9.8 \ g$ of $H_2SO_4$ is present in $2 \ L$ of a solution. The molarity of the solution is $....... \ M$