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The pH of a 0.015 M ammonia solution is 10.72. What is its hydroxide-ion concentration? please show work.
(a) 0.72 x 10-4 M
(b) 1.91 x 10-11 M
(c) 5.2 x 10-4 M
(d) 1.5 x 10-2 M
(e) 5.2 x 10-3 M
how many of the following combination of reactants would result in a chemical reaction being observed. Aditition of liquid bromine to an aqueous solution of NaCl Aditition of liquid bromine to an aqueous solution of NaI Bubbling chlorine gas
how many grams of caffeine c8h10n4o2 are present in one cup of coffee that contains 8.98 times 1021 caffeine
The frequency of electromagnetic radiation required to promote an electron from n=2 to n=4 in a Bohr hydrogen atom is
a 54.1 gram sample of an unknown hydrocarbon was burned in an excess of oxygen to form 88.0grams of carbon dioxide and 27.0grams of water. what is a possible molecular formula for the hydrocarbon?
the label on liquid gaviscon states that each tablespoon 15 ml contains 95 mg of aloh3 and 412 mg of mgco3. how many
salt dissolves in 9.10g of water to give a saturated solution at 25C. What is the solubility (in g salt/100g of H2O)of the salt show work
The radius of a potassium atom is 235 pm. Determine the density of potassium in g/cm3.
If 15.00mL of 1.00M HCl solution is mixed with 25.00mL of a 0.250M NaOH solution in a process that produces 273 mg of NaCl, what is percent yield
Given two liters of .407 M KCl how many milliliters of this solution you should use to prepare 250.0 ml of .175M KCl
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A molecular compound is dissolved in water at 25 C such that its mole fraction ,X, is 0.225. what is the vapor pressure of the resulting solution if the vapor pressure of pure water is 23.8 torr at 25 C
An electron in the n=7 level of the hydrogen atom relaxes to a lower energy level, emitting light of 93.1nm. What is the value of n for the level to which the electron relaxed
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