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Alkali halides commonly have either the sodium chloride structureor the cesium chloride structure. The molar mass of CsCl is2.88 times the molar mass of NaCl, and the edge length of the unitcell for NaCl is 1.37 times the edge length of the CsCl unitcell. Determine the ratio of the density of CsCl to the density of NaCl.
When 1.150 grams of an unknown nonelectrolyte dissolves in 10.0 grams of water, the solution freezes at -2.16°C. What is the molecular weight of the unknown compound? Kf for water = 1.86°C/m.
A sample of mercury(II) oxide is placed in a 5.00 L evacuated container and heated until it decomposes entirely to mercury metal and oxygen gas
A gas expands and does P-V work on the surroundings equal to 283 J. At the same time, it absorbs 216 J of heat from the surroundings. What is the change in energy of the system
A dancehall contains 173 men and 238 women. A certain "promenade" calls for the formation of groups, with each group consisting of one man with two women. a)How many groups could be formed? b) which sex is in excess? By how much? (show calculation..
What volume of .305M AgNO3 is required to react exactly with 155mL of .274M Na2SO4 solution
a 54.0 g ice cube initially at 0degc is dropped into a styrofoam cup containing 375 g of water initially at 21.2degc.
This is for the dissolution of (NH_4)(NO_3) in water. If 4.52 mole of NH_4 NO_3 are dissolved, how many total moles of ions are produced
if 28ml of 6.2 m sulphuric acid was spilled determine what is the minimum mass of sodium bicarbonate or sodium hydrogen
Calculate the molar solubility of Pb(IO3)2 in water by systematic method. {ksp for Pb(IO3)2 = 2.5 x 10^-13}
Which of the following statements correctly describe the energy and energy changes in a system? Select all that apply. 1. Energy is defined as the ability to do work.
What is the maximum amount of silver (in grams) that can be plated out of 4.8 {rm L} of an {rm{AgNO}}_3 solution containing 3.6 % {rm Ag} by mass? Assume that the density of the solution is 1.01.
What is the pressure in a 10.0- cylinder filled with 0.455 of nitrogen gas at a temperature of 315
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