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Consider an aqueous solution that is 0.934 M in FeCl2 (MW = 126.752 g/mol) with a density of 1.31 g/mL. Calculate the molality, mass percent, and mole fraction (?) of FeCl2 in this solution. The MW of H2O is 18.02 g/mol.
Which of the following ionic compounds has the largest lattice energy (i.e., the lattice energy most favorable to a stable lattice)?
The activation energy for a reaction is 55.5 kj/mol. if the rate constant for the reaction has a value of 1.35 * 10^2 s^-1 at 25 degrees Celsius what will it be at 95 degrees Celsius
What is the first step in an aldol condensation reaction. A. Elimination of hydroxide. B. Bromination of carbonyl compound. C. Addition into the carbonyl. D. Formation of the enolate. E. Protonation of the carbonyl compound.
calculate the amount of energy in kilojoules needed to change 135 of water ice at 10 to steam at 125 . .... how many
Calculate the activity for CS2 at mole fraction CS2=.722 for a Raoult's Law standard state using the following data: PCS2=446.9 Torr, and P*CS2=512.3 Torr
The heat of vaporization of water is 9.72 Kcal/mol. How much heat (in kilocalories) is required to vaporize 2.70 mol of H2O and how much heat (in kilocalories) is released when 440 grams of steam condenses
what is the pressure of dry H2 in mmHg. and in atm. Assuming the ideal gas behavior, how many moles of H2 gas were collected
If 85.0 mg of fluorine-18 is shipped at 8:00 a.m., how many milligrams of the radioisotope are still active if the sample arrives at the radiology laboratory at 1:30 p.m. ?
Understanding Vapour Pressure, Which would you expect to exhibit the highest vapor pressure at room temperature?
Calculate the pH of a buffer solution that is 0.250 M in HCN and 0.170 M in KCN. For HCN, Ka = 4.9 x 10^-10 (pka = 9.31). Use the equilibirum approach to calculate
Why was the titration performed by the addition of permanganate solution to oxalate solution and not the other way around? Why was the experiment performed at an elevated temperature?
How many fluoride atoms are in the tube of toothpaste? How many grams of sodium ion are in 2.10 toothpaste? How many molecules of triclosan are in the tube of toothpaste?
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