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Given 25.00 mL of the unknown weak acid, 12 mL of NaOH solution was added to the unknown. Leave the unknown weak acid and NaOH concentrations as variables. The pH of the solution is 4.13. What is pKa for the acid?
Mercury is a toxic heavy metal which is liquid at room temperature. To form HgBr2, mercury(II) bromide, a student reacts elemental bromine with elemental mercury
How much heat is evolved when 239 g of ammonia gas condenses to a liquid at its boiling point?
To what final volume would 100 mL of 6.0 M NaCl have to be diluted in order to make "physiological saline" (0.54 M NaCl)
80.0 of is initially at room temperature (22). A chilled steel rod at 2 is placed in the water. If the final temperature of the system is 21.5, what is the mass of the steel bar?
How many moles of a reducing agent are used in a reaction containing 1.5L of this material which possesses a density of 0.8 and a molecular weight of 56
ketones react with dimethylsulfonium methylide to yield epoxides by a mechanism that involves (1) an initial nucleophilic addition followed by (2) an intramolecular Sn2 substituition, Show the mechanism.
What tripeptide would be synthesized from the informational strand of DNA with the sequence 5' GTATCCAGT?
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.
Which of the following statements is/are correct. i. KBr, HClO3, and HClO2 are strong acids ii. NaH, KOH, and Li2O are strong bases iii. HI, HClO3, and HNO3 are strong acids
Based on ion charges and relative ion sizes, rank these ionic compounds by their expected melting points (highest to lowest).
Describe the preparation of 12 mL of a 0.050 M solution of each of the halogens, using the reactions in the preceding question. Available to you are solid Ca(OCl)2
you have 75.0 ml of a 2.50 m solution of na2cro4aq. you also have 125 ml of a 1.52 m solution of agno3aq. calculate the
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