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A student finds a shiny gold-covered rock and decides to determine if it is gold. She first determines that the mass of the rock is 4.7g. She then finds that upon absorption of 57.2J of heat the temperature of the rock rises from 25 degrees C to 57 degrees C. What is the specific heat capacitance of the substance? Assuming your experimental error is +/- 10%, is it gold?
What is the percentage ionization of the acid? What is the value of Ka for the acid? 2) Periodic acid, HIO4, is an important oxidizing agent and a moderately strong acid. In a 0.20 M solution
Draw the structures of the two carbocation intermediates that might form during the reaction of the alkene (below) with HCl. If the two carbocations differ in stability,
Vapor Pressure due to water at 24oC: 22.4 torr For the conditions listed above, calculate the volume of O2(g) produced at standard conditions of temperature and pressure.
celcius have enough energy to overcome the activation energy barrier for a particular reaction, what is the activation energy for this reaction
Copper(I) ions in aqueous solution react with NH3 according to, Cu+ + 2 NH3 Cu(NH3)2+ Kf = 6.3x10^10 M-2 Calculate the solubility of CuBr (Ksp = 5.3x10^-9) in a solution in which the equilibrium concentration of NH3 is
Illustrate this by showing the reaction of trans-p-anisalacetophenone with bromine and 2,4-dinitrophenylhydrazine to give the corresponding products
Natural lithium is 92.58% lithium-7, with atomic weight 7.016, and 7.42% lithium-6, with atomic weight 6.015. What is the observed atomic weight of lithium as it occurs in nature?
A machine does 300.0 kJ of work on the environment, and emits 200.0 kJ of heat. What is the change in internal energy of the machine?
3- Complete combustion of 3 moles of cycloheptatriene (C7H8) would require how many moles of oxygen, and produce how many moles of water
the density of pure silver is 10.5 gcm3 at 20degc. if 6.17 g of pure silver pellets is added to a graduated cylinder
Imagine you are working on ways to improve the process by which iron ore containing Fe2O3 is converted into iron: Fe2O3(s) + 3 CO(g) 2 Fe(s) + 3 CO2(g)
Solve an equilibrium problem (using an ICE table) to calculate the of each of the following solutions. A.) .16 M CH3NH2
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