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A Cu/Cu2+ concentration cell has a voltage of 0.21V at 25 °C. The concentration of Cu2+ in one of the half-cells is 1.4×10-3M . What is the concentration of Cu2+ in the other half-cell?
A mixture of C3H8 and C2H2 has a mass of 2.0 . It is burned in excess O2 to form a mixture of water and carbon dioxide that contains 1.5
How many moles of hydrogen are in a sample of octane, C8H18, that contains 303.9 grams of carbon
question the vapor pressure of a water-insoluble organic substance is negligible at 100 degree c. can this substance be
When 2.00 g of hydrazine decomposed under constant-pressure conditions, 7.00 kJ of heat were transferred to the surroundings. What is delta H for the following reaction? 3 N2H4(l) --> 4 NH3(g) + N2(g)
Iron metal is coated wih nickel. Which of metals will undergo corrosion when coating is damaged? Give the scheme of electrochemical corrosion and write equations for the reactions
The total molarity of acid and conjugate base in this buffer is 0.100 M. A student adds 7.10mL of a 0.410\it M \rm HCl solution to the beaker. How much will the pH change? The pKa of acetic acid is 4.760.
All hydrogen sulfide (H2S) contained in 4.00 g of crude oil is removed by distillation and collected in a CdCl2 solution. The precipitate of CdS is then filtered, washed and converted into CdSO4 by calcination.
One mole of carbon-12 atoms is equal to a mass of exactly how many grams of carbon-12 atoms?
What spectral features (including Carbon spectra, IR spectra, Proton spectra, and Mass spectra) differentiate Benzoic acid (product) from Benzonitrile (starting material)
Which of the following shows the fully balanced version of the following half-reaction in acidic solution. H2S(aq) → S(s)
In calibrating a drop counter, a student had an initial buret reading of 0.41 mL and a final buret reading of 4.71 mL after dispensing 75 drops from a buret.
The equilibrium constant, Kp , for the reaction N2O4 (g) == 2 NO2 (g) is 0.142 at 298 K. What is G for the reaction
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