What mass of Na2CO3, in grams, is required for the complete reaction of 50.0 mL of 0.125 M HNO3? MW Na2CO3 = 105.98 g/mol. Na2CO3(aq) + 2 HNO3(aq) → 2 NaNO3(aq) + CO2(g) + H2O(l)A student is asked to prepare a 0.15 M H2C2O4, oxalic acid, solution. The total volume of the solution is 250.0 mL. The student calculates the mass of oxalic acid, H2C2O4, that is required to prepare the 250.0 mL of a solution that has a concentration of 0.15 M H2C2O4. MW H2C2O4 = 90.03 g/mole. Is that student correct, why or why not? If incorrect, what should the mass be?A student weighs out 5.33 g of NiBr2 and transfers it to a 100-mL volumetric flask, adds enough water to dissolve the solid, and then adds water to the 100-mL mark on the neck of the flask. Calculate the concentration (in molarity units) of nickel bromide in the resulting solution.

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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

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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What mass of Na₂CO₃, in grams, is required for the complete reaction of 50.0 mL of 0.125 M HNO₃? MW Na₂CO₃ = 105.98 g/mol. Na₂CO₃(aq) + 2 HNO₃(aq) → 2 NaNO₃(aq) + CO₂(g) + H₂O(l)
A student is asked to prepare a 0.15 M H₂C₂O₄, oxalic acid, solution. The total volume of the solution is 250.0 mL. The student calculates the mass of oxalic acid, H₂C₂O₄, that is required to prepare the 250.0 mL of a solution that has a concentration of 0.15 M H₂C₂O₄. MW H₂C₂O₄= 90.03 g/mole. Is that student correct, why or why not? If incorrect, what should the mass be?
A student weighs out 5.33 g of NiBr₂ and transfers it to a 100-mL volumetric flask, adds enough water to dissolve the solid, and then adds water to the 100-mL mark on the neck of the flask. Calculate the concentration (in molarity units) of nickel bromide in the resulting solution.

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