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Three pure compounds are formed when 1.00-{\rm g} samples of element X combine with, respectively, 0.472 {\rm g}, 0.630 g, and 0.789 g of element {\rm Z}. The first compound has the formula {\rm{X}}_2 {\rm{Z}}_3.
The vapor pressure of water at 30.0 degree celsius is 31.82mmHg. A portion of mannitol (C6H14O6, non-volatile) is added to make a 3.50M solution. The solution has a density of 1.048 g/mL. What is the new vapor pressure of the solution
dependent Schrodinger equations of a particle with mass m confined in the one-dimensional potential (1/2)kx^2 , where k is some constant.
How many grams of NaOH are in a 225.0 mL sample of a 2.5 M solution of NaOH? (Molar mass of NaOH is 40.0 g/mol)
When 5.00g of Al2(SO4)3 * 18H2O are heated until it dehydrates how many grams of water are produced
If the emitted green light corresponds to an electron dropping from that excited state back down to the ground state, what is the energy spacing (in aJ) between the highest occupied and lowest unoccupied orbitals. The element used is Thallium.
What color- red or blue- would you expect each of the following to produce when added to litmus
how many grams of dry need to be added to 2.30 of a 0.400 solution of ammonia to prepare a buffer solution that has a
Nitric acid is often manufactured from the atmospheric gases nitrogen and oxygen, plus hydrogen prepared by reforming of natural gas, in a two-step process.
A thyroid condition called Goiter can be treated by increasing Iodine in the diet. Iodized salt contains Calcium Iodate, Ca(IO3)2, which is added to table salt.
If the pH of such a phosphate-containing solution were gradually lowered by addition of HCl or some other strong acid, what three protonated phosphate species would be generated? (Specify the chemical formula and name of each.)
A solution is 0.10 M AgNO3 and 0.10 M Ba(NO3)2. If solid Na2SO4 is added to the solution, what is [Ba2+] when Ag2SO4 begins to precipitate? (Ksp BaSO4 = 1.1 x 10-10; Ag2SO4 = 1.1 x 10-5)
At high temperature, hydrogen and carbon dioxide will reversibly react to form carbon monoxide and water vapor. At 986oC there are 0.11mol of each product and 0.087mol of each reagent in a 1.00L flask. What is Kc under these conditions
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