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Briefly explicate why the concentrations of HC2H3O2 and C2H3O2- ion change when you add 0.10M HCl solution to the HC2H3O2-NaC2H3O2 buffer solution. State an appropriate chemical equation showing the changes that occur.
HC2H3O2 + H2O <------> H3O+ + C2H3O2-
a 50.0 ml sample of vinegar density 1.06 gml was diluted to 500.0 ml.nbsp titration of a 50.0 ml aliquot of this
Compute the number of atoms in the subsequent unit cells a.) body-centered cubic structure b.) hexagonal structure. ii.) Compute the packing efficiency of each above unit cell.
Copper(I) chloride is a slightly soluble salt. The copper(I) ion also combines with Cl- in excess chloride to form the complex ion CuCl2-. Calculate the molar solubility of CuCl(s) in 0.0667 M KCl.
What is the molecular formula of a compound given the molar mass of the compound is 205.4 g/mol and the empirical formula is C3H5.
The half life of mercury-197, used for kidney scans, is 64.1 hours. If a patient undergoing such a scan is given 5.0 ng of mercury-197, how much will remain after 7 days? After 14 days? After 21 days
the pH of a solution is defined as a measure of its hydrogen ion concentration. which of the following correctly defines the relationship between the pH and the hydrogen ion concentration of a solution
Iodine-131 is a radioactive isotope. After 7.00 days, 54.7% of a sample of 131I remains.
If Qp = 1.2 1020 and PO2 = 0.318 and PN2 0.812, what is the partial pressure of NO?
container a with 150ml contains a gas with an unknown pressure. container b with volume 250ml contains a gas under 628
A gas occupies 678 ml at 0.935 atm and 70 F, what will its volume be at 1.078 atm and 70 C
a student reported the following for his unknown mixture 25 nh4cl 30 nacl and 50 sio2. assuming that the calculations
The following question refers to a solution that contains 1.79 M hydrofluric acid, HF (Ka = 7.2 x 10^-2) and 3.00 M hydrocyanic acid, HCN (Ka = 6.2 x 10^-10). What is the pH of this mixture of weak acids
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