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A 22.0 g block of copper at 45°c absorbs 2.50 kj of heat. given the specific heat of cu is 0.385 j/g·°c what will be the final temperature of the cu? I tried to use Q=MS(delta)T and solve for the tinal temp instead of the change in temp but kept getting 45°c.
Determine the value of K (the thermodynamic equilibrium constant) at each temperature. b) Assuming that ?H°rxn is independent of temperature, determine the value of ?H°rxn from these data.
According to VSEPR theory, if there are five electron domains in the valence shell of an atom, what will be the expected electron domain geometry.
In an acid-base titration experiment, 50.00 mL of a 0.0500 M solution of acetic acid (ka=1.75 x 10^-5) was titrated with a 0.0500 M solution of NaOH at 25 degree C
The molar mass of the compound is 303.8 g/mol and the molar masses of C, O, and Ag are 12.-1 g/mol, 16.00 g/mol, and 107.9 g/mol, respectively. Determine the empirical and molecular formula of the compound.
Calculate the standard free-energy change for the following reaction at 25 degrees C. 2Au^3+(aq) + 3 Cr(s) 2Au(s) + 3Cr^2+(aq) delta G^degree= ? KJ/mol
For H3PO4, a tripotic acid, Ka1 = 7.1 × 10-3, Ka2 = 6.3 × 10-8, and Ka3 = 4.5 × 10-13. What is the pH of a solution which contains 0.200 mol of K2HPO4 and 0.300 mol of Na3PO4 per liter of solution?
a sample of nitrogen gas occupies 1.55 l at 27.0c and 1.00atm. what will be the volume be at -100.0 C and the same pressure
an ethylene gas torch reqires 3200 L of gas at 3.00 atm. what will be the pressure of the gas if ethylene is supplies by a 250. L tank?
Write the balanced reaction equation for the precipitation of calcium carbonate from potassium carbonate and calcium chloride.
liquid stream containing ethane and propane enters a flash chamber operated at 80 oF and 300 psia. Leaving the chamber, the vapour stream flow rate leaving the chamber
the wavelength of the emitted photon corresponds to the difference in energy between the two energy levels. What were the principal quantum numbers of the initial and intermediate excited states involved?
A meteorological ballon contains 250.0L He at 22 degrees celsius and 740.0mm Hg. If the volume of the ballon can vary according to external conditions
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