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Calculate the molality of C2H5OH in a water solution that is prepared by mixing 50.0mL of C2H5OH with 100.0 mL of H2O at 20 degrees celsius. the density of C2H5OH is .789 g/mL at 20 degrees celsius.
Suppose 532 mL of neon gas at 20C and 1.04 atmospheres and 376 mL of SF6 gas at 20C and 0.97 atmospheres are put into a 275-mL flask. If the temperature remains constant, calculate the partial press
The piston is moved to increase the volume to 6.00 L. Which of the following is a reasonable value for the pressure of the gas at the greater volume?
If I initially have a gas at a pressure of 12 atm, a volume of 23 liters, and a temperature of 200 K, and then I raise the pressure to 14 atm and increase the temperature to 300 K, what is the new v
What are the advantages and disadvantages of recycling metals?
If 161 mL of wet H2 is collected over water at 24 degrees C and a barometric pressure of 739 Torr , how many grams of Zn have been consumed? (The vapor pressure of water is 22.38 torr.)
The temperature of the ideal gas in the container shown is 300 K. The gas occupies a volume of 1.27 m3. What would be the volume of the gas if its temperature were decreased to 100 K? No blocks are
By what factor (how many times) will the rate constant increase when the temperature is raised from 10°C to 28°C?
For a parallel reaction A giving B and C, the reaction rate constant k1= 4.8 ×10-7 s-1, the selectivity between C and B was found to be 15. The initial concentration of A was 4.0×10-3mol
what is the molarity of a solution prepared by combining 125mL of 0.251 molar HCl with 250mL of pure water.
At 25.0°C, a sample of Xe gas occupies 545 mL in a piston-cylider apparatus when the external pressure is 751 torr. At what pressure (torr) will its volume become 673 mL if the temperature does
What is the best way to distinguish between levorotatory and dextrorotatory enantiomers if measured optical rotation is -90 and 270 degrees?
Write the lewis structure for SeF6. What is the general "ABX" structure, shape name, and molecular polarity?
For the voltaic cells that you measured that used silver and copper provide the reaction that represents the voltage observed.Repeat this for the cell that used lead and copper. D oes copper behave
what concentration of aqueous NaCl solution freezes at -15.2 C? the freezing point of pure water is 0.0 C and Kf of pure water is -1.86 C/m.
You have 100 mL of toluene total and need the extraction to be 90% complete (only 10% remains in aqueous phase). Describe how this can be done.
Calcium carbonate reacts with hydrochloric acid to forma a salt, carbon dioxide and water. Write the balanced equation and determine how many grams of salt will be produced of 50g of calcium carbona
a chemist makes a solution of 1.33 Mol CaCl2 and 800 kg water, and then discovers that the freezing point of the solution is significantly less than 0 c how coudl teh chemist change the solution to
What is the theoretical yield of calcium carbonate if 2.05 grams of calcium chloride dihydrate reacts with excess sodium carbonate according to the balanced chemical reaction shown below?
The half-life for the reaction at 550 C is 81.3 seconds. How long does it take for 78.5% of a phosphine sample to decompose?
Provide the chemical reaction of an oxidation-reduction reaction that was observed to be spontaneous.Provide a value for the standard cell voltage for this reaction. Is the voltage a positive value
The half-lives were found to be 161 min at 199 degrees celcius and 12.5 min at 230 degrees celcius. Calculate the acivation energy for this reaction.
Starting with only the solid, it is found that at 40C the total gas pressure (NH3 and CO2) is 0.33 atm. Calculate the euilibrium constant Kp/
Then after ten to fifteen minutes it was noted that the pencil lead that was held by the red clip turned a black color and the pencil lead held by the black clip turned a red color. There was no cha