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The oxygen generated from the decomposition of the potassium chlorate converted some of the iron to iron(III) oxide. If the combined mass of iron and iron(III) oxide was 17.9 grams, calculate the mass of iron(III) oxide and the mass of the potassium chlorate decomposed.
Calculate the equilibrium constant for the reaction
A sample of gas contains four gases (He, Ne, Ar, and Xe) with the following partial pressures: He (43 mm Hg), Ar (835 mm Hg), and Xe (111 mm Hg). If the total pressure in the container is 1355 mm Hg, what is the partial pressure of Ne in the sampl..
When making up an unknown solution for absorption measurements, a good plain is to make up a solution that is rather on the concentrated side, measure its absorbance and compare it to the absorbance range of your standard curve. If it is higher th..
A bottle of nail polish remover contains 182 mL of acetone, how much heat would be released by its complete combustion? The density of acetone is 0.788mL.
An unknown element forms a yellow ion, XO . It forms a precipitate with silver ions. If 48.0 mL of a 0.250 mol/L solution of silver ions is added to a solution of the unknown ion, 1.856g of a red-brown precipitate are formed. Determine the iden..
an aqueous solution of a nonelectrolyte boils at 100.32c. what is its expected freezing
Sodium-24, which is used to locate blood clots in the human circulatory system, has a half-life of 15.0 hours. A sample of sodium-24 with an inital mass of 34.1 g is left to decay for 60.0 hours. Calculate the final mass of the sodium sample
so I have the reaction CuCl2 + H4ClSiO4. what I dont have is what this makes afterward, could someone please explain to me what the Molecular, total ionic and net ionic equations would be
in the titration of 25.00ml of 0.100M CH3COOH, calculate the number of milliliters of 0.200 M NaOH that must be added to reach a pH of a)3.85, b) 5.25,
Using a solution of KMnO 4 has a percent transmittance of 27.3 percent when observed in a 1.15-cm cell at a wavelength of 525 nm. Compute the absorbance of this solution.
The value of heat of reaction for the following reaction is -6535 kJ. What will the amount of heat in kJ evolved during the combustion of 13.1 grams of C6H6? The value of heat of reaction for the following reaction is -6535 kJ. What will the a..
A 7.50 g piece of iron at 100 C is dropped into 25.0g of water at 22.0 C. Assuming that the heat is lost by the iron equals the heat gained by the water, determine the final temperature of the iron/water system. Assume a heat capacity of water 4.1..
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