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A hot air balloon has a volume of 960 l at 18 degrees c. What temp must it be heated to raise its volume to 1200L, assuming the pressure remains constant?
The following reaction is spontaneous only below 3000 K. What conclusions can be drawn regarding this reaction? A + B ® AB
Calculate the minimum pH needed to precipitate Mn(OH)2 so completely that the concentration of Mn2+ is less than 1 Microgram per liter
Both (E)- and (Z)- 2-cholorobutenedioic acids dehydrochlorinate to give acetylene dicarboxylic acid. The Z acid reacts about 50 times faster than the E acid. Explain.
According to the Born-Haber Cycle, find the lattice energy of magnesium chloride. How does your result explain the energetic favorability of ionic solid formation
A compound contains only carbon, hydrogen, and oxygen. Combustion of 51.34 g of the compound yields 75.26 g of CO2 and 30.81 g of H2O. The molar mass of the compound is 90.078 g/mol.
Compare the stabilities of an allylic anion and a homoallylic anion, each with the formula C6H11-. An allylic anion has the negative charge on an atom adjacent to the double bond.
A cylindrical gas chamber has a piston at one end that can be used to compress or expand the gas. If the gas is initially at 928.1 Torr and when the volume is 7.351 L, what will the pressure be in mmHg if the volume is adjusted to 3.570 L
An unknown mass of each of the following substances, initially at 22.0^circ C, absorbs 1950 J of heat. The final temperature is recorded as indicated. Find the mass of each substance. a. Pyrex glass (T_f=55.1^circ C. B.sand (T_f=62.3^circ C). C.et..
calculate the amount of heat required to completely sublime 88.0 g of solid dry ice co2 at its sublimation temperature.
The vapor pressure of an unknown compound at 25 degrees C is 94.6 Torr and its enthalpy of vaporization is 30811 J/mol. Estimate the normal boiling point of this compound. assume the enthalpy of vaporization is independent of temperature.
Does the molar solubility of lead(II) iodide increase, decrease, or remain the same with the addition of potassium iodide to the solution? Explain
An interesting and unique feature of DNA is that it may be both replicated, thus ensuring genetic continuity, and transcribed, to enable expression of the genetic information.
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