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You are given a crushed sample that is a mixture of limestone (CaCo3), lime (CaO), and sand. The calcium carbonate, limestone, is the only material present in the material that will decompose when heated. You subject a 5.3563g sample of the mixture to strong heating and after the sample reaches constant mass the sample has a final weight of 3.2887g. What is the percentage of calcium carbonate present in the original mixture? (f.w.t. CaCO3=100.1)
A 2.74g lead weight, initially at 10.8Celcius, is submerged in 7.80g of water at 51.9Celcius in an insulated container. What is the final temperature of both substances at thermal equilibrium
calculate the bicarbonate and carbonate alkalinities in mgl as caco3 of a water having a total alkalinity of 233.0mgl
Suppose the radius of an atom in a body-centered cubic unit cell is 0.35 nm. What is the edge length of the unit cell in nm.
When 20.0 g C2H6 and 60.0 g O2 react to form CO2 and H2O, how many grams of water are formed
Determine the ph ( to 1 decimal place) of a slution prepered by adding 125ml of 0.759M acetic acid to 10.3g of sodium acetate. the pKa of acetic asid is in table 10.2. Assume the volume of the solution does not change?
For a particular reaction, delta H = -32 kJ and delta S = -90. J/K. Assume that H and S do not vary with temperature. (a)[Under standard conditions] At what temperature will the reaction have delta G = 0
Calculate the molarity of a solution made by dissolving 0.650 grams of Na2SO4 in enough water to form exactly 880 mL of solution.
a nugget of pure gold of 4.80 grams absorbed heat of 283 joules. if the temperature was 23.0degc initially then
aluminum and oxygen react to form aluminum oxide by the equationals o2gnbspnbsp regnbspnbsp al2o3sin a certain
What is the mole fraction of methane in the mixture? (Assume that the water produced by the combustion is in the gaseous state.)
Need to prepare a solution of 0.2 L 0.4 M then determine how many cm^3 of a solution of H2SO4 (sulfuric acid) 80.0%
A rigid container of O2 has a pressure of 340 kPa at a temperature of 713 K. What is the pressure at 273 K?
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