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What is the osmotic pressure, in atm, of a solution formed by dissolving 14.1 g of CaBr2 in 0.670 L of water at 53.4 oC? (R = 0.0821 L-atm/mol-K; 0 oC = 273 K)
Scientists are working on purifying PFK-1C from rabbit brain tissue. The rabbit brain tissue was homogenized and centrifuged to remove insoluble material.
Sketch a molecule of Pbr3Cl2 in which the chlorines are in axial position position. Sketch another molecules of Pbr3Cl2 in which the chlorines are equatorials positions.
A chemist burns a a saltine cracker in a calorimeter containing 2.0 kg of water. The water temperature increases from 25.0°C to 29.7°C. Calculate the heat content of the cracker in J per cracker.
NaOH + CO2 - >Na2CO3 + H2O. If the average human body discharges 716 g of CO2 per day, how much NaOH is needed each day for each person in the spacecraft? Answer in units of mol.
A first order reaction has a rate constant of 0.342 sec^-1 at 29.5 degrees C. If the activation energy is 69 kJ, calculate the temperature in degrees C at which the rate constant is 0.428 sec^-1.
Calculate H0rxn for the decomposition of tetrazene, N4H4 (atom sequence H2NNNNH2) to hydrazine (N2H4) gas and dinitrogen gas.
Identify the elements that correspond to the following atomic numbers. label each as a noble gas ? a halogen ?an alkali metal? an alkaline earth metal? a transition metal? a lanthanide metal? or an actinide metala 17 b 4 c 63 d 72 e 2 f 92 g 55
What is the wavelength (in nm) of photons which have energies of 895 kilojoules per mole
If 122 mL of a 1.2 M glucose solution is diluted to 550.0 mL, what is the molarity of the diluted solution?
A 355 ml container holds .146g of Ne and an unknown amount of Ar at 35 degrees C and a total pressure of 26 mmHg. Calculate the moles of Ar present
since the soulutions are dilute, assume that all the solutions have the same density and specific heat capacity of water. the heat capacity of the calorimeter is insignificant.
Calculate the % atom economy for the following two methods for converting benzene, C6H6, to aniline, C6H5NH2.
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