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What is the change in internal energy when a gas contracts from 377 mL to 119 mL under a pressure of 1550 torr, while at the same time being cooled by removing 124.0 J of heat energy?
Calculate the masses of the solids you must measure out to prepare 100mL of 0.025M KNO3.....You must include the waters of hydration when calculating the formula weights.
Question: An isotope of sodium, 24Na , has a half-life of 15 hours. A sample of this isotope has mass 2 g.
We will make about 350 mL of approx. 0.2 M NaOH (aq) solution by diluting 6 M NaOH (aq). Calculate the approximate volume of 6 M NaOH you need to make the diluted solution.
The 12 water of hydration are "hydrated(strongly attracted)" to the metal ions of the crystallin alum structure. Are the water molecules more strongly hydrated to the monovalent cation of the trival
An alum is a "double salt" consisting of a monovalent cation, a trivalent cation, and two sulfate ions with twelve water of hydration (waters of crystallization) as part of the crystallin structure.
Lactic acid, HC3H5O3, is a monoprotic acid that dissociates in aqueous solution. If a solution containing 0.50 M lactic acid is 1.66 percent dissociated to ionic form, calculate the value of Ka for
Ammonium nitrate decomposes to N2O and water at temperatures between 250°C and 300°C. Write a balanced chemical reaction describing the decomposition of ammonium nitrate, and calculate the
For the synthesis of potassium alum, advantage is taken by the fact that aluminum hydroxide is amphoteric, meaning it can react as an acid(with a base) or as a base (with an acid).
Sucrose (table sugar) has the formula C12H22O11 (molar mass=342.30 g/mol) and a food value of 6.49 kJ/g. Determine the calorimeter constant of the calorimeter in which the combustion of 2.360 g of
Compare the entropy difference between 1 mol of liquid water at 25C and 1 mol of vapor at 100C and 1.01325 bar. The average specific heat of liquid water may be taken as 4.2 J K-1 g-1, and the heat
Potassium alum, synthesized has the formula KAl(SO4)2 x 12 H20, but when written as a "double salt" its formula is K2SO4 x Al2(SO4)3 x 24H20.
A sample that weighs 25.12 g contains 6.022 X 10^23 particles. If 25.00% of the total number of particles are argon atoms and 75.00% are another element, what is the chemical identity of the other
A 2.50-L vessel contained 0.0153 mol of phosphorus trichloride, 0.0123 mol of phosphorus pentachloride, and 0.0831 mol of chlorine at 250°C in an equilibrium mixture. Calculate the value of Kc f
Determine the solubility of N2 based at 4° and 40°C you must determine the partition coefficient from free energies.
What sort of interaction occurs between adjacent alcohol molecules? And what sort of interaction occurs between adjacent ketone molecules? Which is stronger?
In the first 14.0 of the reaction, 1.9×10?2 of is produced in a reaction vessel with a volume of 0.470. What is the average rate of the reaction over this time interval?
Write symbol for bromine. What is the atomic number of it in periodic table? How many protons and electrons are there in the atom of bromine? Give the highest possible and minimal oxidation number
Bacterial digestion is an economical method of sewage treatment. The reaction
A piece of metal alloy with a mass of 114g was placed into a graduated cylinder that contained 25.Ml of Water, raising the water level to 56.7 ML. What is the density of the metal?
Water and glycerol, CH2(OH)CH(OH)CH2OH, are miscible in all proportions. What does this mean? How do the OH groups of the alcohol molecule contribute to this miscibility?
How would you expect the solubility of these compounds in water and in hexane to change as n increases? Explain.
A reaction is known to be zero order in [SOCI2] and second order in [CH3CN]. The reaction rate constant is 2.1 x 10^2 M^-1 s^-1. What fraction of the original amount of SOCI2 is present after 40 secon
A solution is made by dissolving 6.10 g of K2SO4 in 700 mL of water. The freezing point of this solution is -0.24 °C. What is the van't Hoff factor for K2SO4 at this concentration?
Benzene (C6H6) burns in air to produce carbon dioxide and liquid water. Calculate the heat released (in kilojoules) per gram of the compound reacted with oxygen. The standard enthalpy of formation