Consider the following balanced redox reaction. 2S2O32 - + I2 → 2I - + S4O62 - How many moles of I2 can be consumed by 0.65 mL of 0.15 M Na2S2O3?

a. 9.75 x 10-4 moles

b. 1.95 x 10-3 moles

c. 2.17 x 10-2 moles

d. 4.88 x 10-5 moles

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A pycnometer weighs 25.60 g empty and 35.55 g when filled with water at 20°C. The density of water at 20°C is 0.9982 g/ml. When 10.20 g lead is placed in the pycnometer and the pycnometer is again filled with water at 20°C, the total mass is 44.83 g.

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