66. Citric acid, H3C6H5O7, can furnish 3 H ions per molecule. Calculate the equivalent weight of citric acid. a. 192 g b. 96 g c. 384 g d. 64 g e. 576 g 67. You carry out the reaction represented by the following equation: N2(g) + 3H2(g) 2NH3(g) You add an equal number of moles of nitrogen gas and hydrogen gas in a balloon. The volume of the balloon is 1.54 L before any reaction occurs. Determine the volume of the balloon after the reaction is complete. a. 0.513 L b. 1.03 L c. 1.54 L d. 0.257 L e. 2.05 L 68. What mass of solute is contained in 50.0 mL of a 1.18 Mpotassium chloride solution? a. 42.4 g b. 3.16 g c. 59.0 g d. 4.40 g e. 63.2 g 69. You have two solutions of sodium chloride. One is a 2.00 M solution, the other is a 5.00 M solution. You have much more of the 5.00 M solution, and you add the solutions together. Which of the following could be the concentration of the final solution? a. 4.60 M b. 3.50 M c. 2.60 M d. 7.00 M e. 8.30 M