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Calculate the pH of a solution that is .210M in nitrous acid and .290M in potassium nitrite. The acid dissociation constant of nitrous is 4.50X10^-4.
Limestone, CaCo3, when subjected to a temperature of 900 degrees Celsius in a kiln, decomposes to calcium oxide and carbon dioxide. How much heat is evolved or absorbed when one gram of limestone decomposes?
If 175 g of X reacts completely with diboron trioxide to produce 2.43 mol of B4X3, what is the identity of X?
For the following, identify the process as a spontaneous process, a nonspontaneous process, or an equilibrium process at the specified temperature.
A reaction takes place inside a constant pressure calorimeter. The heat absorbed by the calorimeter is measured to be +15J.
the vapor pressure of dichloromethane rm ch2cl2 at 0 rm circc is 134 rm mmhg. the normal boiling point of
the addition of a crystal of sodium chlorate to a sodium chlorate solution causes additional crystals of sodium chlorate to precipitate. the orginal solution was what
The heat of combustion of bituminous coal is 2.5 × 104 J/g. What quantity of the coal is required to produce the energy to convert 100. lb of ice at 0°C to steam at 100°C?
A 12.4 g sample of CaCl2 is dissolved in 112 g of water, with both substances at 25.0°C. Calculate the final temperature of the solution assuming no heat lost to the surroundings and assuming the solution has a specific heat capacity of 4.18 J/°C·..
Pre-Lab Assignment- Understanding Activity 3 in this manual and significant figures and uncertainty in measurements in general will help you answer the last two questions
Using the periodic table only, determine which members of the set have the shortest and longest bond lengths. N-H N-S N-O
Are the following statements about a 1.0 M solution of a strong acid, HA, true or false? [A-] › [H+]: True/False
the molar heat of fusion is 6.02 kJ mol-1, obtain an expression in terms of A and D that gives the total heat needed to melt the block of ice if its temperature is the normal melting point.
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