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The OH concentration of 0.45 M ammonia, NH3, is 6.7X10^-4 M write
a. the reaction equation for its ionization
b. the equilibrium constant expression
c. and solve for the value of Kb(k sub b)
What volume of NaOH was delivered to reach the midpoint in this titration. At the midpoint the pH is measured at 4.75, what is the Ka for the weak acid
Write the structures of all the alkenes that can be formed by dehydrohalogenation of each of the following alkyl halides.
An unknown acid has a molar mass of 90. g/mol and a mass composition of, 40%-C, 6.7%-H, and 53.3% -O. What is the molecular formula of the acid
how much aspirin is recovered? Solubility of aspirin in water at 25oC is one gram of aspirin per 300 milliliters of water.
Assuming that a particular individual's stomach contains 1 quart of 0.1 M HCl, and that an antacid tablet contains as its active ingredient 500 mg of calcium carbonate, what would the final pH of this individual's stomach contents be after taking ..
A 250.0-mL sample of water was adjusted to pH 10 with ammonia buffer and calmagite indicator was added. The prepared sample required 30.84 mL of 0.00802 M EDTA for titration to the endpoint. Calculate the hardness as ppm CaCO3
names of five alkenes having the molecular formula C6H12 that produce hexane on catalytic hydrogenation
What is the pH of the solution after the addition of 80.0 mL of 0.0500 M NaOH(aq) to the buffer. What is the pH of the solution after the addition of 10.0 mL of 1.0 M HNO3(aq) to the initial buffer
A certain reaction has an activation energy of 60.0 kj/mol and a frequency factor of A= 3.10×1012 M^-1s^-1 . What is the rate constant k , of this reaction at 30.0 Deg celsius?
Arrange the spectrochemical series of VO2+
a balloon is filled with 500.0 ml of helium at a temperature of 27 degrees celsius and 755 mm hg. as the balloon rises
A quantity of 7.48g of a compound is dissolved in water to make 300 mL of solution. The solution has an osmotic pressure of 1.43 atm at 27 Celsius. Calculate the molecular weight of the compound.
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