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If 4 g of CuSO4 is dissolved in 9.0x10^2 mL of 0.40 M aqueous NH3, what are the concentrations of Cu2+, Cu(NH34 2+, and NH3 at equilibrium? (Kf = 5x10^13)
What is the specific heat for the metal if It takes 48.0J to raise the temperature of an 8.60g piece of unknown metal from 13. Degree Celsius to 24.3 degree celsius?
At what temperature will a gas be at if you allow it to expand from an original 456 mL at 65 celcius to 3.4 L?
If 13.5g of (NH_4)_2SO_4 is dissolved in enough water to form 230mL of solution, what is the molarity of the solution.
If a customer replaces a 85 watt bulb with an 20 watt compact fluorescent bulb that lasts 5000 hours, how much less coal (lbs)will be used to generate the electricity that is saved?
The density of tungsten is 19.35 g/cm3. A sample of tungsten is placed in a graduated cylinder containing 30.0 mL of water and the water level rises to 34.0 mL. What is the mass in grams of the sample of tungsten?
The density of a liquid sulfur compound is 1.14 gmL1. This compound contains 23.7% sulfur. How many milliliters of the compound must be burned to obtain 6.40 g of SO2? Molar Mass SO2 64.1 gmol
Chemistry The rate of a first-order reaction is followed by spectroscopy, monitoring the absorption of a colored reactant at 520 nm. The reaction occurs in a 1.09-cm sample cell
Calculate how many grams of Ni2+ are present in 3.36 moles of nickel(II) fluoride(NiF2) and also determine the number of moles of F- ion are present in 4.82 grams of nickel(II) fluoride.
What mass would carbon disulfide gas (CS2) have if 125 cm3 of the gas at 400°C exerts a pressure of 736 torr?
How much energy is released during the complete combustion of 470 grams of cyclobutane
Calculate the wavelength of light that would be required to excite an electron from the HOMO to the LUMO. Hint: Recall that (triangle)E=hv=hc/lambda, and that 1 eV=1.602 x 10^-19 Joules.
How much energy in joules is required to heat 295 mL of coffee from 25.0 0C to 62.0 0C? Assume that the coffee has the same density, 0.997 g/mL, and specific heat capacity, 4.184 rm J/(gc. K) .
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