The $ppm$ level of $F^{-}$ in a $500 \ g$ sample of a toothpaste containing $0.2 \ g$ $F^{-}$ is:

The concentration of an aqueous solution of $0.01 \ M \ CH_3OH$ is very nearly equal to which of the following?

The density of a $10.0\% \, w/w$ aqueous solution of $KCl$ is $1.06 \, g \, cm^{-3}$. The molarity of this solution is ........

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 $\%$)

$125 \, cm^3$ of isopropyl alcohol is added to water to make a solution of volume $175 \, cm^3$. Find the volume fraction and volume percentage of isopropyl alcohol in the solution.

Calculate the molality of $1 \ L$ solution of $93 \ \%$ $H_2SO_4$ (weight/volume). The density of the solution is $1.84 \ g/mL$.