hw1solution_pdf

# 2 7347 torr correct 3 cannot be computed from the

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2. 734.7 torr. correct 3. Cannot be computed from the informa- tion given. 4. 775.5 torr. Explanation: P bar = 755 . 1 torr P vapor = 20 . 4 torr Using Dalton’s Law of Partial Pressure, the sum of the partial pressures will be equal to the total pressure. In this instance, the sum of the partial pressure of the water vapor plus the partial pressures of all the other compo- nents of air will equal the total barometric pressure. P bar = P vapor + P everythingelse P everythingelse = P bar - P vapor = 755 . 1 torr - 20 . 4 torr = 734 . 7 torr 026 3.8points How much of a 4.45 M CaBr 2 solution can be prepared if one has 79.6 g of CaBr 2 available? 1. 1.77 L 2. 0.115 L 3. 1.65 L 4. 1.00 L 5. 0.564 L 6. 3.54 L 7. 0.0895 L correct 8. 0.0356 L Explanation: [CaBr 2 ] = 4.45 M m = 79 . 6 g ? L CaBr 2 = 79 . 6 g CaBr 2 × 1 mol CaBr 2 199 . 9 g CaBr 2 × 1 L soln 4 . 45 mol CaBr 2 = 0 . 0895 L CaBr 2
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