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Assume you are assigned to prepare 0.250 g of orpiment. Describe how you would go about doing so. Make sure to include all the amounts of materials and the equipment you would use. You should plan to use this procedure as your guide for perparing your assigned pigment during the test.
A sample of ammonia gas at 65.5°C and 524 torr has a volume of 15.31 L. What is its volume when the temperature is -15.8°C and its pressure is 524 torr
In the standardization of potassium permanganate why is it unnecessary to add an indicator during the titration. Why is the solution of sodium oxalate acidified with sulfuric acid before titration
A student placed 18.0 grmsof glucose () in a volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the 100 gm. mark on the neck of the flask.
How many moles of magnesium oxide are produced by the reaction of 3.82 g of magnesium nitride with 7.73 g of water? Mg_3N_2 + 3H_2O yields 2NH_3 + 3MgO
a concentration cell consists of two h2h half cells. half cell a has h2 at 0.87 atm bubbling into 0.10 m hcl. half cell
The solubility product of Mg(OH)2 is 1.2 x 10-11. What minimum OH- concentration must be attained to decrease the Mg2+ concentration in a solution of MgCl2 to less than 1.0 x 10-9 M.
It requires 251 J to melt 2.22 g of sodium metal at its normal melting point of 98°C. Calculate the molar heat of fusion of sodium.
A newly isolated natural product was shown to be optically active. If a solution of 2.0 g in 10 mL of ethanol in a 50 cm tube gives rotation of +2.57 degrees, what is the specific rotation of this natural product
How many moles of NH4Cl must be added to 1.0 L of 1.0 M solution of NH3 to prepare a buffer solution with a pH of 9.00 ? of 9.50 ? Kb = 1.8 x 10 -5
Calculate the molar concentration of NaNO3 and the mass percent of NaNO3 in the solution. What is the mole fraction of NaNO3 in the solution?
Write the possible polymeric structure formed between sebacoyl chloride and butane-1,4-diamine, what is the appropriate name for this polymer
The random walk model used to describe gas diffusion can be treated as a binomial distribution similar to coin flips with a 50/50 chance that a particle will move in either the +x direction or the -x direction.
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