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What is the method of separating gold / black sand from magnetite ? Can a box of iron nails and steel needles be separated? How and why?
the so2 concentration in a stack is 400 ppm the stack diameter is 10 ft and the stack gas velocity is 50 ftsec. the gas
Calculate the mass of propylene glycol that must be added to 0.500 kg of water to reduce the vapor pressure by 4.60 torr at 40 degrees celcius.
a sample of 1.518g of KHC8H4O4 was dissolved in water and titrated with an NaOH solution. 26.90 ml were required to reach the equivalence point. Calculate the molarity of the NaOH solution
what is the average density of the sun in units of grams per cubic centimeter? The volume of a sphere is (4/3)?^3.
if 20. g or NaCl are used and only 5.6 g of HCl are isolated, what is the percent yield of HCl C.) If only 5.6 g of HCl are obtained, how many grams of Na2SO4 must also have been formed
a balloon of co2 g has a volume of 17.1 litres and contains 8.3 moles of co2. some carbon dioxide escapes due to a leak
Compounds A and B are isomers of molecular formula C9H19Br. Both yield the same alkene C as the exclusive product of elimination on being treated with tert-butoxide in DMSO Hydrogenation of alkene
A clear gelatinous precipitate of Bi(OH)3 forms in test tube A while no ppt. forms in test tube B. The appearances of test tubes A and B are due to the interplay between the ammonia and bismuth hydroxide equilibria.
a sample of a compound containing only magnesium and oxygen is found to have 194g Mg and 256g of O. What percentages of Mg and O in this compound?
A sample of H2SO4 contains 1.11 grams of H (1.01 g/mol). How many moles of H2SO4 (98.02 g/mol) are present?
the solubility of carbon dioxide in h2o at the temperature of twenty five degree celsius and pressure of co2 1 atm
Which of the following molecular geometries could lead to linear molecule after removal of one atom? A.T-shaped B.See-saw c.Trigonal Bipyramid d.Triangular planar e.Bent
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