Refer to the Integrative Example on page 140. If 138 g Na₂CO₃ in 1.42 L of aqueous solution is treated with an excess of NO(g) and O₂(g), what is the molarity of the NaNO₂(aq) solution that results? 

Integrative Ex.

Sodium nitrite is used in the production of dyes for coloring fabrics, as a preservative in meat processing (to prevent botulism), as a bleach for fibers, and in photography. It can be prepared by passing nitrogen monoxide and oxygen gases into an aqueous solution of sodium carbonate. Carbon dioxide gas is another product of the reaction. In one experimental method, which gives a 95.0% yield, 225 mL of 1.50 M aqueous solution of sodium carbonate, 22.1 g of nitrogen monoxide, and a large excess of oxygen gas are allowed to react. What mass of sodium nitrite is obtained?