6 liters of 0.1 molar sodium hydroxide solution reacted with 2 liters of 0.1 molar iron(III) chloride solution. What is the molar concentration of sodium ions in the remaining solution? 1. 0.075 ( Correct Answer )
2. 0.15
3. 0.3
4. 0.6

Choose an equation that represents an enzyme-catalyzed reaction. (a) enzyme + substrate → enzyme-substrate complex (b) enzyme + substrate ←−→ enzyme + products (c) enzyme + substrate ←−→ enzyme-substrate complex → enzyme + products (d) enzyme + substrate ←−→ enzyme-substrate complex → enzyme-substrate complex + products