QUESTION $4$

What is the concentration of sulfate ions in a $2\mathrm{.}71M$ solution of $N{a}_{2}S{O}_4?($give your answer to $3$ sig figs. Do not include units$)$

QUESTION $5$

What is the molarity of solution when $1\mathrm{.}64$ moles of $Ca(N{O}_3)2$ are dissolved in enough water to make $500.mL$ of solution. $($Give your answer to $3$ sig figs. Do not include units$)$

QUESTION $6$

What is the molarity of nitrate ions when $1\mathrm{.}33$ moles of $Ca(N{O}_3)2$ are dissolved in enough water to make $500.mL$ of solution. $($Give your answer to $3$ sig figs. Do not include units$)$