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The most common experimental technique to perform elemental analysis is combustion analysis, where a sample is burned in a large excess of oxygen and the combustion products are trapped in a variety of ways. A 99.99% pure,0.4949g sample containing only carbon, hydrogen, and nitrogen is subjected to combustion analysis, resulting in the formation of 1.386g CO2,0.2817g H2O, and0.1877g NO. What is the empirical formula of the sample?
An unit cell of CsCl was given. Chlorides are at the corners of a primitive cube with a cesium in the middle. Using the Cs atom as the origin calculate the first three terms of the Madelung constant for a CsCl crystal.
Calculate how many grams of O2(g) can be produced from heating 20.9 grams of KClO3(s).
a quantity of liquid methanol ch3oh is introduced into a rigid 3.00 l vessel the vessel is sealed and the temperature
Problem- Nutritional tables give the potassium content of a standard apple as 159 mg. There are about 3 apples/Ib. How many grams of potassium are in 40.36 kg of apples
If 0.250 L of aqueous solution with a density of 1.00 g/mL contains 13.7 micrograms of pesticide, express the concentration of pesticide in ppm
A 0.150 M NaCl solution is referred to as a physiological saline solution because it has the same concentration of salts as normal human blood. Calculate the mass of NaCl needed to prepare 275.0 mL of a physiological saline solution.
The Kb of methylamine, CH3NH2, is 4.2 x 10-4. Calculate the pH of a solution of 0.431 M methylamine.
Write the chemical equation describing solubility equilibrium and the solubility product constant expression for Cu(IO3)2(s) and Ba3(PO4)2(s)
Calculate the pre-equilibrium concentration of Fe3+(aq) in a solution made by mixing 2.8 mL of 2.010?3 M Fe(NO3)3 and 7.2 mL of 2.010?3 M NaSCN. Assume the final volume is 10.0 mL.
determine the final temperature of a gold nugget mass376gthat starts at 398 k and losses 4.85 kj of heat to a snowbank
Choose all of the processes from below which describe changes which are independent of the path by which the change occurs. the elevation increase experienced by a traveller travelling from Grand Isle, LA to Denver, Colorado
a if 65.65 g of mercuryii nitrate and 4.26 g of hydrogen sulfide are mixed in 490.0 g of water to form 54.16g of
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