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You wish to prepare 500.0 mL of a 550.0 ppm w/v fluoride (MW = 18.9984 g/mol) solution. How many grams of beryllium fluoride (BeF2, MW = 47.01 g/mol) are needed to prepare this solution? Assume the final solution has a density of 1.00 g/mL.
A hydrate has the following percent composition: Pb = 54.61%, C = 12.66%, H = 1.61%, O = 16.88% and H2O = 14.24%. What is the formula of the hydrate.
the balanced equation for a reaction in the process of the reduction of iron ore to the metal is shown below.fe2o3s 3
calculate whether a precipitate of lead chloride will form or not on mixing equal volumes of 0.010 m fo lead nitrate
Balance the following half reaction: HS(-) = S2O3(2-) AND calculate what the slope of the boundary between HS- and S2O3^2- is in a pe-pH diagram.
The diffusion coeffiicent of a particular kind of t-RNA molecule is D=1.0x10^-11 m^2 s^-1 om the medium of a cell interior. How long does it take molecules produced in the cell nucleus to reach the wall of the cell at a distance 1.0um, correspondi..
The mercury in the arm attached to the gas is 15.8 cm higher than in the one open to the atmosphere atmospheric pressure is 0.971 atm Express answer in three significant figures
Use balanced equations to determine whether either Fe(OH)2 or CuS has a different solubility with a change in pH:CuS changes solubility with changing pH. Fe(OH)2 does not change solubility.
You are an EH&S professional returning home from your plant on a summer Friday afternoon at about 4 p.m. You have just picked up some materials from a nearby building supply store for a weekend backyard project
A 500.0-g iron bar at 212 degrees Celsius is placed in 2.0-L if water at 24.0 degrees Celsius. Explain what will be the change in temperature of the water. Presume no heat is lost to the surroundings.
What alkene (including cis and trans isomers) would be produced by the dehydration of the following alcohols? Where possible, predict the relative amounts of each product according to Zaitsev's rule. a. 3-pentanol b. 2-methyl-2-butanol c. 1-butano..
Calculate the volume of 1.94×10-3-M H2SO4 solution needed to provide 4.83×10-3 g of H2SO4.
consider the reaction ag bb lt-gt cgfor which k130. assume that .406 mol of cg is placed in a cylinder that has a
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