of a mixture of and was heated. The volume of evolved was at STP. Calculate the percentage of in the — Mole Concept and Some Basic Concepts of Chemistry Chemistry Question

💡 Solution & Explanation

$2NaHCO_3 \rightarrow Na_2CO_3 + CO_2 + H_2O$. <br>$\text{moles } CO_2 = 0.56 / 22.4 = 0.025 \text{ mol}$. <br>$\text{moles } NaHCO_3 = 2 \times 0.025 = 0.05 \text{ mol}$. <br>$\text{Mass } NaHCO_3 = 0.05 \times 84 = 4.2 \text{ g}$. <br>$\% = (4.2/5.0) \times 100 = 84\%$.