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Zinc metal reacts with yellow crystals of sulfur in a fiery reaction to produce a white powder of zinc sulfide. A chemist determines that 65.4 g of zinc reacts with 32.1 g of sulfur. How many grams of zinc sulfide could be produced from 12.0 g of zinc metal?
Find the confidence limit (95% confidence level), true value (from literature), absolute error, and relative error).
What is the pH of a solution prepared by mixing 200 ml of 0.1 M HCl with 300 ml of 0.1 M sodium acetate and diluting the mixture to 1 L?
The products include Cr3+ ion and I2. What was reduced in the reaction and what was the reducing agent?
A patient weighs 165 pounds and is to receive a drug at a dosage of 45.0 mg per kg of body weight. The drug is supplied as a solution that contains 25 mg of drug per mL of solution. How many mL of the drug should the patient receive?
For the reaction shown below, Kp = 0.116 at 38.6 °C. Find the equilibrium partial pressures of ALL species if at the start of the reaction PCO = 1.17 atm and PCOBr2 = 1.4 atm
how many joules of heat are needed to raise the temperature of 591 grams of water from 25C to 55C?
How many milliliters of boiling water are required to dissolve 25g of phthalic acid? If the solution were cooled to 14oC, how many grams of phthalic acid would you recrystallize out?
The steam is then sent back to the boiler (constant pressure heat exchanger) and reheated to 300oC. In a secondary turbine, the steam is expanded to 10kPa.
Predict the coordination number in a NiS crystal. The ionic radii for Ni+2 and S-2 are 0.069 and 0.184nm, respectively.
For a particular reaction, Delta H = -30kJ and Delta S = -92J/K . Assume that Delta H and Delta S do not vary with temperature. Part A. At what temperature will the reaction have Delta G = 0
A flask contains 0.230 mols of liquid bromine Determine the number of bromine molecules present in the flask.
If we react 116 molecules of TiCl4 with water according to the equation TiCl4 + 2 H2O -> TiO2 + 4 HCl how many molecules of HCl will we form?
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