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Niacin is one of the B vitamins and it acts in solution as a weak acid (call it HN). If a 2.00 x 10-2 M of HN is prepared the pH of the solution is 3.26. What is the Ka for this acid.
When the following equation is balanced, what is the mole ratio of H2O to Be3N2?
what volume in milliliters of a 0.0992 m naoh solution is required to reach the endpoint in the complete titration of a
Fumaric acid, which occurs in many plants, contains 41.4% C, 3.47% H, and 55.1% O by mass. A 0.5 mol sample of this compound has a mass of 58.0 g.
If you know the balanced equtaion of a reation and the cange in concentration in one of the products or reactents, you can determinethe change in concentation of all the other products an reactants.
Calculate the theoretical titration curve for the titration of 50.00 mL of 0.1000 M Na2CO3 with a 0.2000 M solution of HCl. Propose the indicators.
Estimate the value of the equilibrium constant at 685 K for each of the following reactions. Delta H and S for BrCl(g) is 14.6 kJ/mol and 240.0 J/ mol * K, respectively. 2 NO_2(g) > N_2O_4(g.
not enough air is pumped into a raft to completely fill it out. the atmospheric pressure is 14.7 psi. what is the pressure of the air inside the raft?
CaH2(s) + 2H2O(l) Ca(OH)2(aq) + 2H2(g) How many grams of CaH2 (Molar Mass = 42.1 g/mol)are needed to generate 10.0 L of H2 gas if the pressure of H2 is 769 torr at 28.0°C?
Given the following vapor pressures at 20 degrees Celsius, arrange the compounds in order of increasing boiling point: butane, 1,650 mm Hg; acetaldehyde, 740 mm Hg; Freon-113, 284 mm Hg.
A solution containing 82.0 g of ascorbic acid dissolved in 230 g of water has a density of 1.22 g/mL. Calculate the molarity of ascorbic acid in the solution.
1.664 g of a solid white acid are dissolved in water and completely neutralized by the addition of 45.37 mL of 0.580 M NaOH. Calculate the molar mass of the acid, assuming it to be a monoprotic acid.
we will titrate 50.0ml of 0.200m nh3aq pkb 4.76 with 0.200m hclaq.a. what is the initial ph of 50.0ml of 0.200m nh3aq
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