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If you have a sample of 2.5 mol of Fe2(SO4)3, how many mol of sulfate ion do you have?
The concentration of Fe2+ in a sample of water is 350 mmol/L At what pH will 99% of the Fe2+ be precipitated as Fe(OH)2? Ksp = 7.9 x 10-15
Calculate the pressure in the flask in atmospheres and torr also If the sealed-tube manometer in had a height difference of 20.0 inches between the Hg levels?
36 grams of an impure zinc sample are reacted with excess hydrochloric acid and 10 L of hydrogen gas are collected at STP, what is the percentage of PURITY of zinc sample
Empirical and Molecular Formulae, The analysis of an organic compound produces the following elemental analysis: % C is 59.999% and % H is 4.476%.
If 3.00 g of (NH4)2SO4 is dissolved in enough water to form 200. mL of solution, what is the molarity of the solution?
Calculate the molality of the solution and the molar mass of reserpentine.
solid sodium metal reacts with water, giving a solution of sodium hydroxide and releasing hydrogen gas
The imaginary nonmetal E has two isotopes 50E(isotopic mass 49.9715 u abundance 76.66%) 52E (isotopic mass 51.9663 u) Calculate the atomic mass of E as it would appear in the periodic table.
The vapor pressure of water at 45.0 degrees celcius is 71.93 mmHg. Calculate the vapor pressure of a solution of 1.50m K2CO3 at this temperature
A 1.40 mL sample containing chromium-51 as a tracer was injected into a patient. Z After several hours a 5.50 mL of blood was drawn and its ctivity compared to the injected tracer sample.
the density of an aqueous ethanol solution is .789 g/mol. How many grams of ethanol should be mixed with water to make 225mL to make a 4.5% ethanol solution?
The carbon-14 in a living organism is constant until the organism dies, after which carbon-14 decayss with first order kinetics and a half life of 5730 years. Suppose a bone from an ancient human contains 19.5%of the C-14 found in living organisms..
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