Equal masses of $SO_2$,$CH_4$,and $O_2$ are placed in an empty container at $298 \ K$. The total pressure is $2.1 \ atm$. What is the partial pressure of $CH_4$ in the mixture in $atm$?

White phosphorus reacts with chlorine and the product hydrolyses in the presence of water. Calculate the mass of $HCl$ obtained by the hydrolysis of the product formed by the reaction of $62 \ g$ of white phosphorus with chlorine in the presence of water.

The molarity of a $NaOH$ solution prepared by dissolving $4 \ g$ of it in $250 \ mL$ of water is: (in $M$)

What is the mass of the precipitate formed when $50 \ mL$ of $16.9 \%$ solution of $AgNO_3$ is mixed with $50 \ mL$ of $5.8 \%$ $NaCl$ solution (in $g$)? (Atomic masses: $Ag = 107.8, N = 14, O = 16, Na = 23, Cl = 35.5$)

The conversion of oxygen to ozone occurs to the extent of $15\%$ only. The mass of ozone that can be prepared from $67.2 \ L$ of oxygen at $1 \ atm$ and $273 \ K$ will be ............ $g$.

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