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A student did an alkalinity determination correctly, except that the sample titrated has a volume of 90.0 mL Volume A was found to be 4.50mL and volume B was 7.00 mL
a) calculate the alkalinity value from these data and the calculate the correct value
Equilibrium is established for the reaction 2X(s) + Y(g) ? 2Z(g) at 500K, Kc = 100. Determine the concentration of Z in equilibrium with 0.2 mol X and 0.50 M Y at 500K. A) 3.2 M B) 3.5 M C) 4.5 M D) 7.1 M E) None of these.
Calculate the amount of heat to remove from 5 pounds of 232 degrees steam to create 5 pounds of 162 degrees water.
A white precipitate is observed to form. (a) Write the full ionic equation for the chemical reaction including spectator ions: (b) Write the net ionic equation. (c) Write the name of the white solid
Calculate the percent ionization of 8.0×10?2 M lactic acid (Ka = 1.4x10^-4) Calculate the percent ionization of 8.0×10?2 M lactic acid in a solution containing 4.5×10?3 M sodium lactate.
design a qualitative analysis scheme that will be used to calculate which cations are present in a solution containing
What was the purpose of using aq. NaOH in aldol condensation lab? A. It acts as an electrophile on which an enolate ion can attack B. It acts as a nucleophile which can attack an electrophilic carbonyl carbon.
A buffer solution contains 0.71 mol of boric acid (H3BO3) and 0.53 mol of sodium dihydrogen borate (NaH2BO3) in 4.00 L. The Ka of boric acid (H3BO3) is Ka = 5.8e-10. pH of buffer solution
The mass of the final solution is 73.0 grams, and its heat capacity is 3.85 J/g°C; the heat capacity of the calorimeter is 5.0 J/°C. Calculate the ?Hreaction in kJ/mol metal.
A reaction in which A,B ,C and react to form products is first order in A, second order in B, and zero order in C. What is the overall order of the reaction?
urea at 25c are 0.605 atm and 0.245 amt respectively. calculate the van't hoff factor for the CaCl2.
Calculate the partial pressure (in atm) of HBr at equilibrium when 5.00 atm of CH3Br and 5.00 atm of H2O react at 1000 K according to the following chemical equation
The decomposition of N2O5 in CCL4 is a first order reaction. If 2.56 mg of N2O5 is present initially and 2.50 mg is present after 4.26 minutes at 55 degrees Celsius what is the value of the rate constant K?
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