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State the mass balance and charge balance equations for a solution that is .45 M in NaF as well as saturated with CaF2
A CD player and its battery together do 500 kJ of work, and the battery also releases 250 kJ of energy as heat and the CD player releases 50 kJ as heat due to friction from spinning
When 0.100g of graphite is burned completely in a bomb calorimeter(heat capacity =3.344kJ/?C), containing 3000 g of water, a temperature rise of 0.21?C is observed.
Calculate the weight of water required to steam distill 500 mg of bromobenzene at 95 degree Celsius. The vapor pressure of water at this temperature is 640 torr; that of bromobenzene is 120 torr
the velocity of flow toward the sphere along the longitudinal axis is found to be u=-U0(1-r0^3/x^2) where r0 is the radius of the sphere and x is the distance from its center. determine the acceleration of an air particle on the x-axis upstream of..
How many grams of Na2SO4 are there in 15 mL of 0.50 M Na2SO4? (b) How many milliliters of 0.50 M Na2SO4 solution are needed to provide 0.038 mol of this salt?
Calculate the standard free-energy change for the following reaction at 25 degrees C. 2Au^3+(aq) + 3 Cr(s) 2Au(s) + 3Cr^2+(aq) delta G^degree= ? KJ/mol
what is the pH of the HF solution before base is added. 3) What is the pH at eqivalence point. 4) what is the pH at 1/2 volume to equivalence point.
Predict whether the following will result in an increase or decrease in entropy and justify your reasoning. Desalination of water
what volume of a concentrated solution which is 36.0 by mass and has a density of 1.179 should be used to make 5.00 of
The acidic constituent in vinegar is acetic acid. A 10.0-mL sample of a certain vinegar contains 500. mg of acetic acid. What is this mass of acetic acid expressed in micrograms?
What mass (in grams) of solid KCl would need to be added to 500 grams of water to make an ideal solution with a boiling point
Dry coke is combusted with dry air to generate the solid refuse, the flue gas and the superheated steam. Calculate the heat transfer to of from the process. Use a constant Cp for the inert of 8.5 J/g and assume everything at 1atm.
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