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Calculate pFe2 at each of the following points in the titration of 25.00 mL of 0.02075 M Fe2 by 0.03616 M EDTA at a 6.00 pH:11.50 mL, The equivalence point, Ve and at 19.0mL
The vapor pressure of benzene is 53.3 kPa at 60.6°C, but it falls to 51.5 kPa when 19.0 g of a nonvolatile unknown organic compound is dissolved in 500 g of benzene. Calculate the molar mass of the compound.
A 1.20 sample of dry ice is added to a 745 mL flask containing nitrogen gas at a temperature of 25.0 C and a pressure of 735mmHg .
If 88 J of heat are added to a pure gold coin with a mass of 20 g, what is its temperature change? Specific heat capacity of gold is 0.128 J/g'C
Would the following procedural errors cause an increase, a decrease, or no change in your calculated molecular weight? Indicate clearly the reasoning in each case.
What is the percent hydrogen (H) by weight of a solution containing 53.5 mL of CH3COCH3? The density of acetone is 0.788 g/mL.
C2H4(g) + H2O(g) C2H5OH(g) 1 mol C2H4, 1 mol H2O at 355K and 1 bar. Using equilibrium constant approach, calculate the equilibrium extent of reaction and the mole fractions
How many many molecules of XeF6 are formed from 12.9L of F2 (at 298K and 2.60atm). Asssume there is an excess of Xe
find out the molecular formula and empirical of this compound and determined to contain 4.36 grams of phosphorus and 5.64 grams of oxygen
Why do you wash the ether layer with sodium carbonate? 4. Why is this experiment more expensive than the Fisher esterfication process? When is this method perferred?
a sample of gas mixture from a neon sign contains 0.0856 mol ne and 0.0254 mol kr. what are the mass percentages of ne and kr in the gas mixture?
A particular first-order reaction has a rate constant of 1.35 × 102 s-1 at 25°C. What is the magnitude of k at 75°C if Ea=85.6 kJ/mol
A 2.50-L container is filled with 187 g argon. If the pressure is 10.0 atm, what is the temperature?
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