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Calculate the pH at the points in the titration of 40.00 mL of 0.425 M NH3 for the reaction below. NH3(aq) + HNO3 ? NH4+(aq) + NO3?(aq) For NH3, Kb = 1.8x10-5. Enter your answer with 2 decimal places. Enter scientific notation as 1.23E4. (a) When 11.50 mL of 0.470 M HNO3 have been added. (b) When 65.00 mL of 0.470 M HNO3 have been added.
2A(g) + 3B(g) → A2B3(g) If 0.5 atm of gas A is mixed in an evacuated reaction flask with 1.0 atm of gas B, what is the final pressure in the reaction flask? (assume that the reaction goes to completion)
write a balanced molecular equation to represent the neutralization between NaOH and Molybdic acid.
Given that the concentration of the most dilute solution is 2.57*10 \(-6\) M. Determine the concentration of the original HBr stock solution
A mass of G grams of a liquid are placed in a closed 15 liter, fixed-wall container. The molecular weight of the liquid is 18 g mol-1. Its molar heat of vaporization is 44 kJ mol-1. Its normal boiling point is 373 K. A scientist measures the press..
A .10M solution of the weak acid HCN has an equilibrium constant of 4.9 X 10^-10. Calculate the percent dissociation of the acid
Use the standard enthalpy change of formation data to calculate the standard enthalpy change of combustion of C5H12O.
The mole fraction of oxygen in the atmosphere is .21. If the barometric pressure is 0.975 atm, what is the concentration of oxygen in water? Kh=1.3 x10^-3 M/atm
If 5.0 g of Al reacts with 4.45 g of O2, what is the empirical formula of aluminum oxide? (Type your answer using the format CO2 for CO2.)
Calculate the mass of KI in grams required to prepare 5.00x10^ 2mL of 3.2 M solution.
Write the competing equilibrium that will occur when a strong acid is added to the following equilibrium: Ca2+(aq) + C2O4 2-(aq) equlibrium CaC2O4(aq)
A rechargeable battery is constructed based on a concentration cell constructed of two half-cells. The volume of each half-cell is 2.1 and the concentrations of in the half-cells are 1.30 and 1.2×10?3.
To the organic chemist, mass spectrometry is especially useful in the determination of the structure of a new compound because it provides information about
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