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Calculate the pH at the equivalence point in the titration of 25.00 mL of 0.120 M chloropropanoic acid (Ka = 7.8 x 10-5) using NaOH (0.085 M).
A patient needs to take 625 of ibuprofen twice daily. The pills in the bottle are each 250. . How many pills does the patient need to take each time she wants the 625 dosage? Assume that these pills are scored and can be cut in half if necessary.
What mass of CaCl2, when dissolved in 100.00g of water, gives an expected freezing point of -5.0 degrees celcius; CaCl2 is ionic?
What is the maximum no of S.F possible in final result (concentration of NaOH)? Explain.
Consider a saturated solution of Zinc arsenate, Zn3(AsO4)2, in which the following reactions can occur: Zn3(AsO4)s (s) --> 3Zn+2 + 2AsO4 -3 Ksp=1.0e-27 AsO4 -3 + H2O ---> HAsO4 -2 + OH- Kb1=3
A gaseous reaction occurs at a constant pressure of 45.0 and releases 61.0 of heat. Before the reaction, the volume of the system was 9.00 . After the reaction, the volume of the system was 3.00 .
Also, at the end 1.31 g of 4,4-dimethyl-2-cyclohexen-1-one was obtained. My question how to calculate percent yield for 4,4-dimethyl-2-cyclohexen-1-one and theoretical yield for this lab.
The solubility of BaSO_4 is 2.4*10^-3 g/L at room temperature. What is the value of K_sp for BaSO_4 at this temperature?
A 5.5 g sample of metal at 100.0 degrees celsius is placed in a calorimeter with 20.0 g of water at 15.0 degree celsius. If the temperature of the water rises to 21.0 degrees celsius, what is the specific heat of the metal?
energy to heat a certain sample of pure silver from 12.0 C to 18.2 C. Calculate the mass of the sample of silver.
Suppose that a 4.0 L sample of gas at 1.0 atm is heated from 44°C to 53°C, during this process the volume doubles. What will the final pressure of the gas sample be
At some temperature, a chemist found the following equilibrium concentrations. [Fe3+] = 6.63 10-3 M, [SCN-] = 7.36 10-3 M, [FeSCN2+] = 4.34 10-2 M
Calculate the wavelength, in naniometers, of the spectral line produced when an electron in a hydrogen atom undergoes
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