Chapter 3, Problem 73E

Elixirs such as Alka-Seltzer use the reaction of sodiumbicarbonate with citric acid in aqueous solution to producea fizz:
$\begin{array}{l}{\text{3NaHCO}}_3\left(aq\right)+{\text{C}}_{\text{6}}{\text{H}}_8{\text{O}}_7\left(aq\right)\to \hfill \\ {\text{3CO}}_{\text{2}}\left(g\right){\text{+3H}}_2\text{O(}l{\text{)+Na}}_3{\text{C}}_6{\text{H}}_{\text{5}}{\text{O}}_7\text{(}aq\text{)}\hfill \end{array}$
a. What mass of C6H8O7 should be used for every $\text{1}{\text{.0×10}}^{\text{2}}{\text{mg NaHCO}}_{\text{3}}$ ?
b. What mass of ${\text{CO}}_{\text{2}}(g)$ could be produced from sucha mixture?