$10 \, L$ solution of urea contains $240 \, g$ urea. The active mass of urea will be

For the combustion reaction of $1 \ mol$ of benzene,if all reactants and products are in the gaseous state,then $\Delta n_{(g)}$ is equal to ......

What volume of $0.1 \, M \, H_2SO_4$ is required to completely neutralize $40 \, mL$ of $0.2 \, M \, NaOH$?

The number of molecules in $100 \, mL$ of $0.02 \, N$ $H_2SO_4$ is .....

What mass in $g$ of hydrated oxalic acid $(H_2C_2O_4 \cdot 2H_2O)$ should be added for complete neutralization of $100 \ mL$ of $0.2 \ N \ NaOH$ solution?

What is the normality of $1.5 \ M \ H_3PO_4$ (in $.5$)?