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What is the pOH of a 0.20 M solution of pyridine (Kb = 1.4 x 10-9) at 25°C?
Although the formula of this new chemical is a trade secret, it can be revealed that the formula for Herbigon is X-acetate (XCH3COO, where "X" represents the top-secret cation of the salt).
a female needs to take ibuprofen of 375mg twice daily. the pills in the bottle are each 250 mg. determine how many
A 224mL sample of an aqueous solution contains 2.80% MgCl2 by mass. Exactly one-half of the magnesium ions are Mg?28, a beta emitter with a half-life of 21 hours
When a sample of neon with a volume of 628 mL and a pressure
Write complete balance molecular equation for the following reactions and what type of reaction it is
This compund has been measured to be 68.47%C and 5.47%H. The rest is oxygen. What is the empirical formula? Specifically, how do you determine O
you require a buffer with ph of 4.50. you have 1.00l of a solution of 1.80m acetic acid. how many grams of solid sodium
a. For a weak acid with a pKa of 6.0, show how you would calculate the ratio of acid to salt at pH 5. b. Suppose you have just added 100 mL of a solution containing 0.5 mol of acetic acid per liter to 400 mL of 0.5 M NaOH. What is the final pH?
Then, if the speed of a reaction becomes approximately double, when the temperature is raised by 10 ° C, what is the activation energy of this reaction (expressed in kJ mol -1), in case the initial temperature is 27 ° C?
If the enzymes were taken from a potato (for temperature) and a cow liver (for pH), what would be the ideal temperature and pH for this new source of enzyme?
Chlorine is widely used to purify municipal water supplies and to treat swimming pool waters. Suppose that the volume of a particular sample of Cl2 gas is 8.80 L at 885 torr and 25*C.
Suppose you started with 2.6 M of HCN(aq), what would be the molar concentration of HCN(aq) at 20 days?
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