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The rate constant for a first-order reaction is 5.50 x 10-4 s-1 at 39oC and 2.32 x 10-3 s-1 at 56oC. What is the activation energy
What is the percent purity of the calcium hydroxide if the titration requires 21.42 mL of the acid to reach the endpoint
A sample of an ideal gas has a volume of 3.35 L at 14.40C and 1.50 atm. What is the volume of the gas at 21.60C and 0.987 atm
An automobile antilock brake system (ABS) operates the brakes at 30 pulses per second. How many times do the brakes pulse in 1.00 ds
The value of the Euro is currently $1.32 U.S. and the price of 1 liter of gasoline in France is 0.92 Euro. What is the price of 1 gallon of gasoline in U.S. dollars in France?
An ideal gas in a sealed container has an initial volume of 2.25 L. At constant pressure, it is cooled to 21.00C where its final volume is 1.70 L. What was the initial temperature
If a 0.140 mM solution of MnO41- has an absorbance of 0.210 at 525 nm in a 1.000 cm cell. What is the concentration of a MnO41- solution that has absorbance of 0.620 in the same cell at that wavelen
What is the heat change in J associated with 17 g of gaseous propane at -4 oC changing to solid at -202 oC? c(propane) (g) = 2.40 J/(g.K) c(propane) (liq) = 1.65 J/(g.K) c(propane) (s) = 1.20 J/ (g.
Which of the following molecules would be expected to exhibit hydrogen bonding? a.methane b. hydrogen bromide c. ethanoic acid (acetic acid) d. hydrogen sulfide
Draw the structure of an eight-carbon alkene that would yield the following compound after treatment with ozone followed by dimethyl sulfide
A sealed container holding 0.0255 L of an ideal gas at 0.999 atm and 67C is placed into a refrigerator and cooled to 45C with no change in volume. Calculate the final pressure of the gas.
A process involves the performance of electrical work in the amount w' on a system. Show that if the process is carried out at constant pressure, the heat absorbed is delta H-w'.
You have 425 mL of an 0.35 M acetic acid solution. What volume (V) of 1.10 M NaOH solution must you add in order to prepare an acetate buffer of pH = 5.34
The freezing point of pure benzene is 5.5 Celsius and its freezing point constant is 5.12 C/m. Calculate the molecular weight of the unknown.
If the initial temperature of an ideal gas at 2.250 atm is 62C, what final temperature would cause the pressure to reduce to 1.500 atm
Which of the following accurately lists compouds in order of increasing solubility in water? A. LiCl2, Br2, O2, methanol (CH3OH) B. methanol (CH3OH), LiCl2, O2, Br2 C. O2, Br2, LiCl2, methanol (CH3O
Calculate the vapor pressure of a solution containing 27.5 g of camphor (C10H16O) dissolved in 94.4 g of benzene.
Arrange the following solutions by increasing chloride ion molarity. 1 M NaCl, 1 M FeCl3, 5 M NaCl, 1 M CaCl2, 2 M FeCl3, 2 M CaCl2
A quantity of 7.48g of a compound is dissolved in water to make 300 mL of solution. The solution has an osmotic pressure of 1.43 atm at 27 Celsius. Calculate the molecular weight of the compound.
what is the vapor pressure of ethanol at 20 celcius is 44mm, and the vapor pressure of methanol at the same temperature is 94 mm. Assuming an idea solution, what is the vapor pressure of a solution
What is the net charge at neutral pH of a tripeptide containing only alanine? How does the total number of negative and positive charges change following hydrolysis of the tripeptide
It is desired that the extent of disruption be >= 0.9. Plot how the number of passes varies with operating pressure over the pressure range of 50-125 MPa. What pressure range would you probably w
A process involves the performance of electrical work in the amount w' on a system. Show that if the process is carried out at constant volume, the heat absorbed is delta U-w'.
Name the alkyl branch present on the ring of ibuprofen that is across from the acid functional group