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How many grams of Ammonium phosphate need to be combined to 500. grams of water if the freezing point of the solution is lowered to -8.3o C? (Assume that the ammonium phosphate completely dissociates).given that Kf = 1.86oC/m
when liquid water is put into an evacuated vessel at 25 celsius what is the sign of the change in enthalpy, entropy, free energy, and temperature for the system during this process?
Make a pH- log concentration plot for carbonate (10^-3) and acetate acid (10^-4) for total concentrations.
How many moles of Urea were used to creat this tempreature difference? given the molecules weight (60.0551g/mol), how money grams of urea was used to give this change temperature value?
The type of nuclear reaction shown below is which can be recognized by the fact that it has 2 reactant and 2 products
The falling down of a piece of chalk (when the hand holding it is taken off) is an energy-controlled process, because there is no change in its entropy in the process.
A beaker with 170 mL of an acetic acid buffer with a pH of 5.000 is sitting on a benchtop. The total molarity of acid and conjugate base in this buffer is 0.100 M. A student adds 8.70 mL of a 0.370 M HCl solution to the beaker.
NO (g) + O3 (g)-> NO2 (g) + O2 (g) For the reaction given, the frequency factor A is 8.7 x 1012 s-1 and the activation energy is 63 kJ/mol. What is the rate constant for the reaction at 75°C.
What is the pH of an 85 mL solution containing .215 M NaHCO3 and .203 M Na2CO3?
The reaction of sodium hydroxide with sulfuric acid in water is given by the following equation
how many liters of gasoline would you need to buy to complete a 142- trip in Europe? Use the following conversions
Calculate the volume of carbon dioxide at 20.0 degrees C and 0.910 atm produced from the complete combustion of 5.00 methane. Compare your result with the volume of CO2 produced from the complete combustion of 5.00 kg of propane (C3H8)
What is the mole fraction of each component in a mixture of 12.45g of H2, 60.67g of N2 and 2.38g of NH3
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