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A 0.0884 M solution of a weak base has a pH of 11.79. What is the identity of the weak base?
Weak Base Kb
Ethylamine (CH3CH2NH2) 4.7 × 10-4
Hydrazine (N2H4) 1.7 × 10-6
Hydroxylamine (NH2OH) 1.1 × 10-8
Pyridine (C5H5N) 1.4 × 10-9 Aniline (C6H5NH2) 4.2 × 10-10
To creates a genetically modified transgenic goat that produce a protein that acts as a drug in its milk. The concentration of drug in the milk is 10 mM
Calculate the pH at the equivalence point for the titration of 0.20 M HCl with 0.20 M NH3 (Kb = 1.8x10-5)
A beta -emitting radiation source gives 250 units of radiation at a distance of 5.0m.At what distance does the radiation drop to one-tenth its original value
A 0.204-g sample of a CO3^2- antacid is dissolved with 25.0 mL of 0.0981 M HCl. The hydrochloric acid that is not neutralized by the antacid is titrated to a bromophenol blue endpoint with 5.83 mL of 0.104 NaOH.
Determine the initial quality and temperature of the fluid mixture prior to heating. [quality x1 = 0.182, T1 = 113.3°C] b) Determine the final volume of the steam after heating. [0.546 m3 (546 liters)] Note: 1000 liters - 1 m3
Depict skeletal structure of major organic product produced when benzoyl chloride reacts with 2-methylpropanoic acid in the presence of weak base, pyridine
Explain how might the absorption spectra permit you to assess the relative redox potentials of complexes
1. who does the first ionizaiton energy of the alkali metal in a given period compare with the first ionization energy
Calculate the pH of an aqueous solution that contains 0.135 M potassium hydrogen phosphate and 0.199 M potassium dihydrogen phosphate.
Balance the following ionic Lewis structures by placing the appropriate coefficients. Leave a target blank to indicate the absence of a coefficient.
An atom of element number 33 (As) is in its ground electronic state. Which one of the following sets of quantum numbers could not apply to any of its electrons
Conversion of 0.90 g of liquid water to steam at 100 degrees Celsius requires 2.0 kJ of heat. Calculate the molar enthalpy of evaporation of water at 100 degrees Celsius.
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