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Problem: Cyclobutane decomposes to form ethylene:
C4H8(g) --> 2C2H4(g)
A graph of ln[C4H8] vs. time results in a linear graph with a slope of -3.05 * 10-2 s-1 at 525 degrees Celsius.
Required:
a). What is the half-life, in seconds, of cyclobutane at 525 degrees Celsius?
b). How many seconds are needed for the partial pressure to decrease to 1.0 torr from an initial pressure of 760 torr?
If you drop 25.0 g of warm iron nails (initial temp = 65.4C) into a beaker that contains 100.0 g water at 20.0 C what will the temperature be when the nails and water reached the same temperature
What must be the atomic mass of the metal M If A sample of the compound MSO 4 weighing 0.1131 g reacts with barium chloride and yields 0.2193 g BaSO4.?
What is the ratio of HCO3- to H2CO3 in an exhausted marathon runner whose blood pH is 7.1? Note: There is no need to consider the Ka2, use only the Ka1.
A sample of .6820 g of an unknown compound containing barium ions (Ba+2) is dissolved in water and treated with an excess of Na2SO4. if the mass of the BaSO4 precipitate formed is0.4835 g, what is the percent by mass of Ba in the original unknown ..
Does physical or chemical change take place when sugar dissolved in water. Briefly explain. Explain how can you recover sugar from a sugar solution
Calculate the number of chromium atoms in a 2.0 cm by 1.0 cm by 7.0 cm piece of this stainless steel. Calculate the number of 52Cr atoms in the above sample. The natural abundance of 52Cr is 83.789%.
The density of a 0.438 solution of potassium chromate at 298 is 1.063 .Calculate the vapor pressure of water above the solution. The vapor pressure of pure water at this temperature is 0.0313.
THE IONIZATION ENERGY OF HYDROGEN. In a normal hydrogen atom, the electron is in the lowest energy state. The maximum energy that a hydrogen atom can have is 0 cm-1
The first equivalence point for the titration of 0.2567 grams of a weak acid is reached when a volume of 26.80mL of 0.0510 M NaOH(aq) has been added. What is the molar mass of the acid?
A solution is prepared from 25.0g of benzene, c6h6 and 25.0g of an unknown compound. The freezing point of this solution is 4.3C. The normal freezing point of benzene is -5.12C/m. Determine the molar mass of the compound.
what is the mole fraction for each component when a mixture of the two solvents has a vapor pressure of 35 torr at 20°C. (Hint: look at page 544 in your text.)
With a saturated KCl fill solution, the potential of this half-reaction is +0.197 V. Use the Nernst equation to calculate the activity of the chloride ion.
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