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Calculate the pH of each of the following solutions ( Ka and Kb values are given in Appendix D in the textbook). 0.115 M hydrogen chromate ion (HCrO4^-) . Ka= 3 x 10^-7 pH? 0.119 M pyridine (C5H5N) , Kb= 1.7 x 10^-9 pH? Help me please, iam stuck on these problems.
How much heat energy, in kilojoules, is required to convert 74.0 g of ice at -18.0 C to water at 25.0 C ?
Calculate the molarity of 736 mL of a solution that contains 153 g of sucrose C12H22O11.
An airplane is pressurized to 650 mmHg, which is the atmospheric pressure at a ski resort at 13000 ft altitude: a) if air is 21% oxygen, what is the partial pressure of oxygen on the plan
Calculate the pH of the solution that results upon mixing 20.0 mL of a 0.200 M HCl with 25 mL of.
A compound has 2 ionizable groups, with pKas of 6.2 and 9.5. A 1.0 M solution of this compound (100 mL total volume) is found to have a pH of 6.8. A biochemist adds 60 mL of 1.0 M HCl to this solution. The solution pH is now:
The thermostat in a refrigeraor filled with cans of soft drinks malfunctions and the temperature drops to below 0 degree Celsius. The contents of the cans of diet sodas freeze, rupturing many of the cans.
At a particular temperature, Kp = 0.25 atm for the reaction N2O4(g) 2NO2(g) a. A flask containing only N2O4 at an initial pressure of 4.5 atm
The air in an inflated balloon (defined as the system) is warmed over a toaster and absorbs 130J of heat. As it expands, it does 76kJ of work. What is the change in internal energy for the system?
the students product is contaminated with 5% o a constitutional isomer. give the approximate expected melting point of the students product
B2H6 + 3O2= B2O3+3H2O ;DELTA H=-2035KJ how much heat is released when a mixture of 7.35 g B2H6 and 2.60 g O2 is burned?
Chromium, Manganese, and Barium are all examples of metals that can be prepared in a pure form by combining oxides of these elements with reactive metals
Calculate the molar enthalpy change ?H~rxn for the dissolution of KNO3 in water. Calculate in the error in ?H~
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