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Determine an expression for the change in entropy when two blocks of the same substance and of equal mass, one at temperature T1 and the other at T2 are brought into thermal contact and are allowed to reach thermal equilibrium. Evaluate your answer for two blocks of copper of mass 500g, with Cp = 24.4 J/mol*K, taking T1 = 500 K andT2 = 300 K.
A 100.00 mL buffer solution is 0.175 M in HClO and 0.150 M in NaClO. What is the pH after addition of 85.0 mg go NaOH?
Use the dipole moments of HF and HCL (following) together with the percent ionic character of each bond to estimate Lewis structure of each reactant and product. Identify the free radicals
Consider the two waves, which we will consider to represent two electromagnetic radiations. Wavelength A has a higher frequency (2:1) than the wavelength of B.
What is the mass of a rectangular piece of copper 24.4cm x 11.4cm x 6.6cm? The density of copper is 8.92 g/cm^3.
How much heat is produced in burning 8 mol of CH4 under standard conditions if reactants and products are brought to 298 and H2 O(l) is formed. What is the maximum amount of useful work that can be accomplished under standard conditions by this sy..
Propane reacts with molecular fluorine to form fluoropropane in the presence of light energy. Using curvy arrows to show the movement of electrons, present a reasonable mechanism for this reaction. Label each step in the process.
when 2.74 g of Ba(s) reacts with O2(g) at 298 K and 1 atm to form BaO(s), 11,100 J of heat is released. what is the delta H of formation for BaO(s) in kJ/mol?
Using Raoult's and Dalton's laws, explain why an aqueous NaCl solution will have a higher boiling point than pure water.
Suppose that an 85.0 laboratory animal ingested 10.0 of a substance that contained 2.45% by mass , an alpha emitter with a half-life of 24,110 years. What is the animal's initial radiation exposure in Curies
What is the percent ionization of a solution made by adding 6.00 grams of CH3COOH to 100 g of water (Kb = 0.512 ?C/m) if the boiling point of the solution is 100.712 ?C? Answer in units of %.
how many ml of 4.50 m sodium hydroxide must be added to 250 ml of a 0.200 m nitrous acid solution to make a buffer with
A foul smelling gas produced by the reaction of HCl with Na2S was collected, and 1.00 L sample was found to have a mass of 1.52 g at STP. What is the molecular mass of the gas. What is its likely formula
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