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Molecular iodine, dissociates into iodine atoms at 625 with a first-order rate constant of 0.271. what is the halflife?
At a certain temperature* (probably not 25 ºC), the solubility of silver sulfate, Ag2SO4, is 0.023 mol/L. Calculate its solubility product constant for this temperature.
Which of the two ionic compounds, NaCl or CaCl2 has the larger lattice energy. Why
traces of iron and titanium. If the sapphire were found to contain 0.155 g of oxygen, what is the mass of the gemstone?
A gas expands and does P-V work on the surroundings equal to 259 J. At the same time, it absorbs 216 J of heat from the surroundings. What is the change in energy of the system?
Structure of a compound that when undergoes elimination will produce a product containing conjugation
Calculate the ratio of the potential energies for the interaction of a water molecule with an Al3+ ion (of radius 53 pm) and with a Be2+ ion (of radius 27 pm).
Calculate the mass of emitted into the atmosphere upon accelerating the from 0.0 to 67.0 . Assume that the required energy comes from the combustion of octane with efficiency.
Identify the weaker acid in each of the following pairs: a)HNO3 or HCO3^- b)HSO4^- or H2O c)H2SO4 or H2CO3
The burning of 80.3 g of SiH4 at constant pressure gives off 3790 kJ of heat. Calculate ?H for this reaction.
Carbon tetrachloride, CCl4, is nonpolar. What forces hold the molecules together?
When 1.025 g of naphthalene is burned in a bomb calorimeter, the temperature rises from 24.25 to 32.33 degrees celsiuc. What is the delta E reaction?
State the chemical formula of salt and classify the bond as ionic, polar covalent, or non-polar covalent.
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