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An impure powder contains NaBr (FM 102.894) and an inert material. A 0.489-g sample of the powder was dissolved and treated with excess PBNO,. After the PbBr, (FM 367.01) precipitate was collected, washed, and dried, it had a mass of 0.404 g. What is the weight percent of NaBr in the powder? O 67.9 wt% O 23.2 wt% 46.3 wt% 82.6 wt% 11.6 wt%

An impure powder contains NaBr (FM 102.894) and an inert material. A 0.489-g sample of the powder was dissolved and treated with excess PBNO,. After the PbBr, (FM 367.01) precipitate was collected, washed, and dried, it had a mass of 0.404 g. What is the weight percent of NaBr in the powder? O 67.9 wt% O 23.2 wt% 46.3 wt% 82.6 wt% 11.6 wt%

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
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An impure powder contains NaBr (FM 102.894) and an inert material. A 0.489-g sample of the powder was dissolved and treated with excess PbNO3. After the PbBr, (FM 367.01) precipitate was collected, washed, and dried, it had a mass of 0.404 g. What is the weight percent of NaBr in the powder? O 67.9 wt% 23.2 wt% 46.3 wt% 82.6 wt% 11.6 wt% What is the effect when a salt, such as KNO2, is added to a saturated CaSO4 solution? O A precipitate is formed. The solubility of CaSO, decreases. OA neutralization reaction occurs. OThe solubility of CaSO is not altered. The solubility of CASO increases.
Transcribed Image Text:An impure powder contains NaBr (FM 102.894) and an inert material. A 0.489-g sample of the powder was dissolved and treated with excess PbNO3. After the PbBr, (FM 367.01) precipitate was collected, washed, and dried, it had a mass of 0.404 g. What is the weight percent of NaBr in the powder? O 67.9 wt% 23.2 wt% 46.3 wt% 82.6 wt% 11.6 wt% What is the effect when a salt, such as KNO2, is added to a saturated CaSO4 solution? O A precipitate is formed. The solubility of CaSO, decreases. OA neutralization reaction occurs. OThe solubility of CaSO is not altered. The solubility of CASO increases.
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