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Multiple Choice
Working for question 15 MC should look like this: At 25 degrees concentration is 8mg/L which is 80mg or 0.08g in 10L n = m/M = 0.08/32 = 2.5x10^-3 moles At standard pressure 100kPa V = n x Vn = 2.5x10-3 x 24.79 = 0.061975L or 62mL Therefore the answer is D -