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Most of the alkali halides exhibit the "rock salt" structure shared by NaCl. Using the ionic radii Li 76pm, F 133pm, K 138pm, Br 196pm, show that LiF and KBr are consistent with the rule of thumb that the NaCl structure occurs for radius ratios between .414:1 and .732:1 and calculate densities for LiF and KBr.
Consider the chemical species IF5 and IF4+
Solubility in water in hexane, when mixed water and ether(diethyl ehter), why two layers will form ? Which layer will be top layer why?
calculate the amount of energy in kilojoules needed to change 135 of water ice at -10 degrees celsius to steam at 125
Correct the refractive index and boiling point to 20 degrees Celsius and 1 atmosphere and calculate the density of the unknown?
For a certain glass electrode, the selectivity coefficient for Na+ relative to H+ is 1.0E-12. The electrode is calibrated with NBS standard buffers 6.86 and 9.18,
Determine the empirical formula, molar mass, and molecular formula of the compound. Assume that the compound is a nonelectrolyte. (Type your answer using the format CO2 for CO2.)
Claisen reactions use a stoichiometric amount of base and do not polymerize, unlike aldol reactions that use a catalytic amount of base and can polymerize.
Gives what happens at low pH for aluminum hydroxide. A) Al(OH)3 precipitates B) Al precipitates C) Al dissolves D) Al(H2O)63+ dissolves
should steam distillation be considered as a method of isolation and purification of an organic liquid that has a vapor pressure
A gas sample containing 1.35 mol at 25°C exerts a pressure of 405 torr. Some gas is added to the same container, and the temperature is increased to 50.°C. If the pressure increases to 800. torr, how many moles of gas were added to the container?
Calculate the potential at a platinum electrode in the titration of 50.0 mL of 0.100 M FeSO4 after addition of 7.00 mL of 0.0500 M KMnO4.
the lowest energy product formed in an aldehyde is treated with secondary amine in the presence of trace acidthe lowest energy product formed in an aldehyde is treated with secondary amine in the presence of trace acidthe lowest energy product
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