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A 42.60 gram sample of a hydrate of BaI2 was heated thoroughly in a porcelain crucible, until its weight remained constant. After heating, 39.01 grams of the dehydrated compound remained. What is the formula of the hydrate?
The intermolecular distance of CO is 113.1 pm. the molecular mass of 12C is exactly 12 g/mol. Explain the molecular mass of 16O is 15.995 g/mole. Find out the value of the rotational energy of 12C16O molecule described by J=0 and by J=1.
Platinum crystallizes in a face-centered cubic arrangement with an edge length of 3.924 Å. Estimate how many platinum atoms would fit into a 2.0-nm sphere; the volume of a sphere is (4/3)πr3. Recall that 1A° =1X10-10m and 1 nm = 1 X10-9 m.
A gymnast of mass 70.0 kg hangs from a vertical rope attached to the ceiling. Use the value 9.81m/s 2 for the acceleration of gravity.
performed using 1.8912g of zinc and 1.5965g of iodine. Determine the limiting reactant and calculate the theoretical yield of zinc iodine in grams.
Assuming that nitrogen Henry constant for blood is the same as for water, calculate the amount (in grams) of nitrogen dissolved in blood when breathing normal air containing 80% of nitrogen at:
Calculate the pH of 0.3 mol/L of CaCl2 solution? the answer is supposed to be 7
would be decomposed by a complete reaction with one drop of water? Assume that 1 drop ~ 0.05 mL. If you started with 0.4 g of trityl fluoborate, how much of it would have been left?
The oxidation number of Cr changes during the reaction from ____ to ___. Because of this change, chromium is reduced/oxidized (circle one). The oxidation number of the alcoholic carbon changes from ___ to ___. Because of this change, the carbon is..
A technician obtained the following results for the concentration (mg/dL) of cholesterol in a blood sample: 240, 252, 242, 238, 239, and 236. The technician re-measured the cholesterol in the same blood sample using a different method.
a nitric acid solution containing 71.0 hn3 by mass has a density of 1.42 gml. how many moles of hno3 are present in
How many moles of H+ are in 1.000 mL of the aqueous 2.500 molar HCl solution mentioned above. What is the normality of solution mentioned above. How many H+ ions are present in 1.000 mL of this solution
For an octahedral complex of each of the following metal ion, determine the number of unpaired electrons for both high spin and low spin configurations. In some cases, both may be the same.
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