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Which of the following shows the fully balanced version of the following half-reaction in acidic solution?
H2S(aq) → S(s)
The percent ionization of niacin (C6H5NO2), (whose Ka is 1.5 x 10^-5) in a .020 M solution is 2.7%. Calculate the percentage of niacin molecules ionized in a solution that is (a) 0.010 M (b) 1.0 x 10^-3 M
What biochemical changes are required to convert tyrosine to (a) norepinephrine and (b) epinephrine? and 3- Some bacterial signaling systems involve kinases that transfer a phosphoryl group to a His side chain. Draw the phospho-His side chain.
Under constant pressure conditions, a sample of hydrogen gas initially at 88.0 degree C and 9.50 L is cooled until its final volume is 3.00L. what is its final temperature
If a solution contains 0.01 M Ca^2+, 0.01 M Zn^2+, and 0.01M Ni^2+ ions and you want to separate them using aqueous (NH4)2C2O2, which ion will precipitate first as an oxalate, CaC2O4, ZnC2O4, or NiC2O4
What is the partial pressure of water present at equilibrium, if the reaction is initiated in a 26 L container with a partial pressure of H2 equal to 14.5 atm and excess iron oxide, Fe3O4.
Draw the structure(s) of the carboxylic acids with the molecular formula C5H10O2 that contain a branched carbon chain.
a metal objet with a mass of 19 g is heated to 96 degree celcieus then tranfered to a clorimeter containing 75 g of
what is the balanced equation for the main reaction? equation for important side reactions? why was ethanol, not methanol, used as the organic solvent?
Vinegar has a density of 1.0056 g/cm3 . What is the mass of three liters of Vinegar? Please explain.
Potassium chloride, KCl, sodium sulfate, Na2SO4, glucose, C6H12O6, carbon dioxide, CO2, and ammonium phosphate, (NH4)3PO4, are soluble in water
A 0.00100 mol sample of Ca(OH)2 requires 25.00 mL of aqueous HCl for neutralization according to the reaction below. What is the concentration of the HCl
How many grams of CaCO3 are produced when you react 55.2 mL of 0.150 M Ca(NO3)2 with 0.655 g of Na2CO3? How many grams of Na2CO3 remain unreacted? How many grams of Ca(NO3)2 remain unreacted?
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