A 25.0-mL sample of 0.050 M barium nitrate solution was
mixed with 25.0 mL of 0.050 M sodium sulfate solution
labeled with radioactive sulfur-35. The activity of the initial
sodium sulfate solution was 1.22 * 106 Bq>mL. After the
resultant precipitate was removed by filtration, the remaining
filtrate was found to have an activity of 250 Bq/mL.
(a) Write a balanced chemical equation for the reaction
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