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

If $5.0 \ g$ of $BaCl_2$ is present in $10^6 \ g$ solution,the concentration is .......... $ppm$.

What is the mole fraction of the solute in $2.5 \ m$ aqueous solution?

Which of the following concentration factors is affected by a change in temperature?

$25 \ g$ of a solute of molar mass $250 \ g \ mol^{-1}$ is dissolved in $100 \ mL$ of water to obtain a solution whose density is $1.25 \ g \ mL^{-1}$. The molarity and molality of the solution are respectively

The molarity of urea (molar mass $60 \ g \ mol^{-1}$) solution obtained by dissolving $15 \ g$ of urea in $500 \ cm^3$ of water is