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Sulfuric acid was added to this solution, which precipitated 2.52gof PbSO4. Assuming that all the lead was precipitated, what is the percentage of Sn in the sample which his having the molar ma
Determine the maximum mass of iron, in grams, that can be obtained from the 454g (1.00 lb) of iron (III) oxide? Explain what mass of CO is needed to react with the 454g of Fe2O3?
Determine what mass of O2, in grams, is needed for complete the combustion of 25.5g of methane? Determine the total mass of products expected from the combustion of 25.5g of methane?
Determine what mass AgNO3, in grams, is needed for complete reaction with 0.156g of BaCl2? What mass of AgCl is formed?
Hydrogen cyanide is used in the manufacture of clear plastics such as Plexiglas and Lucite. It is prepared from natural gas (CH4) and ammonia.
The temperature of the water changed from the 20.1*C to 16.7*C.Is the reaction exothermic or endothermic? Explain. 3.5 g of solid NaHCO3 was added to 50.0 g of water in a calorimeter. The m
An energy of 1.09x10^3 KJ/mol is needed to convert the gaseous carbon atoms to gaseous C+ ions and electrons. Calculate the maximum wavelength, in nm, of electromagnetic radiation with the sufficien
Explain in detail when the methy ammonium chloride, CH3NH3+Cl-, is dissolved in the deuterium oxide, only half the hydrogen atoms are replaced with deuterium atoms.
The ionization energy of hydrogen is higher than that of lithium, even though the electron in each case experiences an effective nuclear charge of approximately +1. Explain why would we expect the
Use standard heats of formation ( at 298 K) to determine the heat of the steam-hydrocarbon reforming process:
Explain what would be the velocity of an electron ejected from the metal surface by a photon of 6.0x10^14 1/s frequency striking the metal if the threshold frequency, Vo for a metal is 1.0x10^14 1/
When 2.00 mol of a gas at 330 K and 3.50 atm is subjected to an isothermal compression, its entropy decreases by 25.0 J · K-1.
Calculate which of these two salts has the greater molar solubility s in water when the solubility product constant Ksp = 1.3 x10-37 for copper (II) phosphate, Cu3 (PO4)2 and the Ksp=1.
If two cations are in a solution, it may be possible to separate them by taking advantage of the differing solubility products of their salts with a particular anion.
At least 99.9% of the ion in solution must be removed and incorporated into the solid precipitate that is filtered off, dried, and weighed for a precipitation fraction to be useful as a method for q
Determine the pH of 5.0*10^-8 M HClO4? What fraction of the total H+ in this solution is derived from dissociation of water?
Determine the percent yield of alum if 0.4000 g of aluminum is used in the synthesis of alum and 4.8946 grams of alum is actually collected at the end?
λ for one line of the hydrogen spectrum is .4118 x 10-4 cm. Use this value in the Ryd berg equation to determine the RH value using n1 = 2, and n2 =4.
Quinines, a chemical used in the dye industry and in photography, are an organic compound containing only H, C and O. Determine the empirical formula of the compound of 0.105g of the compound gives
Potassium per chlorate is prepared by the following sequence of reactions:Explain what mass of Cl2 (g) is needed to form the 234 kg of KClO4?
Explain how would you expect the quantity of solvent and rate of cooling to affect yield and the purity? Discuss what are your expectations from the given modifications?
Consider a 5.43g mixture of Fe3O4 and FeO. You react this mixture with an excess of oxygen to form 5.779g of Fe2O3. Determine the percent by mass of FeO in the original mixture.
A 4.37 gram sample of a certain diatomic gas occupies a volume of 3.00 liters at the 1.00 atm and a temperature of 45oC. Find out what is this gas?
Suppose you have a sample of a saccharin containing sweetener with a mass of 0.2140g. Saccharin, an artificial sweetener, has the formula C7H5NO3S.
Determine the ratio of the number of moles of cyclopropane to moles of oxygen if a balloon contains an anesthetic mixture of cyclopropane (cp) and the oxygen (O2) at 170 torr and 570 torr respective