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A 50.0 mL solution of 1.2 M HCl at 24.1 deg Celsius is mixed with 50.0 mL of 1.3 M NaOH, also at 24.1 degrees Celsius, in a coffee cup calorimeter. After the reaction occurs, the temperature of the
Dissolving 3.00g of an impure sample of calcium carbonate in hydrochloric acid produced .656L of carbon dioxide (measured at 20.0 degrees Celcius and 297mmHg).
For the vapor phase decomposition of ethylene oxide to methane and carbon monoxide, the following data were obtained:
After the addition of 20.00 mL of 0.500 M standard KOH solution to a 10.00mL sample of formic acid (HCOOH, Ka = 1.8 x 10-4), the equivalence point is reached. What is the molarity of the formic aci
2,2-dimethyl-1-chlorobutane a primary alkyl halide and 2-chlorobutane a secondary alkyl halide while 1-iodo-2,2-dimethylpropane is a primary as well and isopropyl iodide is secondary?
Calculate the mass of emitted into the atmosphere upon accelerating the from 0.0 to 63.0 . Assume that the required energy comes from the combustion of octane with efficiency. (Hint: Use to calcula
You take 200 g of a solid at 30.0 degrees C and let it melt in 400 g of water. The water temperature decreases from 85.1 degrees C to 30.0 degrees C. Calculate the heat of fusion of this solid.
The partial molar volumes of water and ethanol in a solution with xH2O= 0.60 at 25 degrees celcuis are 17.0 and 57.0cm3/mol, respectively.
An enzyme has a maximum velocity of 48 nmoles substrate converted per sec. In the presence of 4 microM inhibitor, Vmax is 36 nmoles substrate converted per sec with no change in Km. Determine the K
If you had isolated ferrocene from diethyl ehter on the roto-evaporator, what would be the problem with leaving it under vacuum for an extended length of time to remove excess solvent?
CH4 is one of the most important anthropogenic greenhouse gases but it has significant biogenic sources ~ 50% of the total. Its present day mixing ratio in the northern hemisphere (NH) is ~ 1800 ppb
Based upon your experiences, suggest what would be the result if we heated a mixture of dichloromethane (bp 39-40 Celcius) and nappthalene (C10H8 with mp 80-82 degrees celcius and bp 218) to 60 degr
If the reaction of Mo(CO)6 with mesitylene was conducted in the presence of air, what would likely be the decomposition products?
As a system increases in volume, it absorbs 52.5 J of energy in the form of heat from the surroundings. The piston is working against a pressure of 0.500 atm. The final volume of the system is 58.0
A sol. of unknown Calcium concentration is titrated using EDTA. The EDTA is first standardized against a primary standard Zinc sol. prepared by dissolving 0.4088g of Zn in 1.000L of sol.
Cyanides are toxic molecules featuring C-C-N bonds. Isocyanides are an unstable group of molecules where the order of bonding has changed to C-N-C. Under normal conditions, isocyanides will convert
A solution is 0.0010 M in each of the following cations; Ag+, Hg2 +, and Pb +2. The Ksp values for AgCl, Hg2Cl2 and PbCl are 1.8x10^-10, 1.2x10^-18 and 1.7x 10^-5 respectivly.
How many liters of the antifreeze ethylene glycol (C2H6O2) would you add to a car radiator containing 6.50 L of water if the coldest winter temperature in your area is -20.0 degrees C?
A solution is made from 96 g of a nonvolatile solute in 80 grams of water. The solution has a vapor pressure of .312 atm at 75 degrees C. Calculate the molar mass of the nonvolatile solute. The vap
A sample of an ideal gas at 15.0 atm and 10.0 L is allowed to expand against a constant external pressure of 2.00 atm at a constant temperature. Calculate the work in units of kJ for the gas expans
If the internal energy of a thermodynamic system is increased by 300. J while 75 J of expansion work is done, how much heat was transferred and in which direction, to or from the system?
A sol. of unknown Calcium concentration is titrated using EDTA. The EDTA is first standardized against a primary standard Zinc sol. prepared by dissolving 0.4088g of Zn in 1.000L of sol. A 20.00mL a
A 447 cm3 volume of Na2CO3 solution was warmed with an excess of sulfuric acid until all action ceased. A 5.0 L volume of dry CO2 gas measured at STP was given off and collected. What was the molar
How many liters of the antifreeze ethylene glycol (C2H6O2) would you add to a car radiator containing 6.50 L of water if the coldest winter temperature in your area is -20.0 °C?. Calculate the b