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How many grams of ethylene glycol dissolved in 3.55 kg of water needed to lower the freezing point of water to -22.0 c? Kf1.86 c kg/mol
What is the value of the rate constant at the temperature of this experiment? Give an answer with concentration units of molarity and time units of seconds.
A piston has an external pressure of 11.0 atm . How much work has been done in joules if the cylinder goes from a volume of 0.160 liters to 0.580 liters.
Pure 2-methylpentane is held in a closed container at 150 degrees F. Both gas and liquid are present. What is the pressure in the container?
How fast must a 143.5 baseball travel in order to have a de broglie wavelength that is equal to that of an xray photon with landa = 79.0 pm
What volume of 5.00x10^-3 M HNO3 is needed to titrate 80.00 mL of 5.00x10^-3 Ca(OH)2 to the equivalence point
The pressure exerted on a 240 mL sample of hydrogen gas at instant temperaure is increased from .428 ATM to.724 ATM. What will the final volume be for the sample be?
calculate the maximum volume in mL of .15 M HCl that each of the following antacid formations would be expected to neutralize. Assume complete neutralization.
Calculate the catalytic efficiency of lysozyme (in units of M-1 s-1), in terms of the rate of encounter of enzyme with substrate. How does this value compare to the diffusion-limited value of k1 = 109 M-1 s-1?
A reverse osmosis plant desalinates 5x10^6 L/day of feedwater containing 1500mg/L of salts yielding 3x10^6 L/day of product water with 75 mg/L of salt. What would the salt concentration be in the brine?
In the following experiment, a coffee-cup calorimeter containing 100. of is used. The initial temperature of the calorimeter is 23.0 . If 6.80 of is added to the calorimeter, what will be the final temperature of the solution in the calorimeter
The sample is not completely thermally decomposed in the procedure. Will the mole ratio of CaO to CO2 be too high or too low? Explain
If a solution contains 0.01 M Ca^2+, 0.01 M Zn^2+, and 0.01M Ni^2+ ions and you want to separate them using aqueous (NH4)2C2O2, which ion will precipitate first as an oxalate, CaC2O4, ZnC2O4, or NiC2O4
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