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Why was acetyl chloride /ethanol used as source of hydrocholic acid instead of aqueous hydrocholic acid.
A 1.37 gram antacid tablet is added to 25.00 mL of 0.4500 M HCl. After the resulting reaction was complete, back titration required 10.40 mL of 0.1212 M NaOH. Assuming that the tablet contained only calcium carbonate and an inert binder calculate the mass of calcium carbonate and mass percent of calcium carbonate.
As the liquid vaporizes the plunger is pushed out. At equilibrium, the plunger reads 5.46 mL of gas. Atmospheric pressure is 740. mmHg. What is the approximate molar mass of the compound (in g/mol)?
Two substances, A and B, initially at different temperatures, come into contact and reach thermal equilibrium. The mass of substance A is 6.05g and its initial temperature is 20.9?C
Calculate the mass deficiency in amu, binding enery in J/atom, and binding energy in MeV/nucleon for zinc-64, with an actual mass of 63.9291 amu.
Calculate the dye concentration. (3) 5.00 mL of 0.00500 M ferric nitrate is added to 5.00 mL of nitric acid and 10.0 mL of 0.00250 M thiocyanate solution. Calculate the initial Fe3+ concentration before reaction.
A gas occupies 672 mL at 785 mmHg. What volume would it occupy at 453 mmHg at constant temp??
If you compare different TLC analysis with a different developing solvent, what trend do you see regarding solvent composition or solvent polarity and the distance a compound moves
The specific rate constant at 293 K is found to be 2.35 x 10^-4 s^-1 and at 303 K the specific rate constant is found to be 9.15 x 10^-4 s^-1. Calculate the frequency factor for the reaction at 303 K.
A 20.0-L nickel container was charged with 0.889 atm of xenon gas and 1.40 atm of fluorine gas at 400 C. the xenon and fluorine reacts to form xenon tetrafluoride. what mass (g) xenon tetrafluoride can be produce assuming 100 % yield? answer in (g..
determine whether or not the mixing of each of the two solutions indicated below will result in a buffer. 150 mL of .10M HF, 135 mL of .175M HF
Which of the following molecules would a flame ionization detector (FID) be sensitive to after separation on a gas chromatography column?
Write balanced chemical equation and evaluate the molecular weight of the reactants and Calculate the molecular weights of the reactant.
If the heat change for the decomposition of 25.0 g hydrogen peroxide is -72.2 kJ, what is the enthalpy of reaction for the process with respect to moles of hydrogen peroxide?
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