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A concentration cell is constructed of two hydrogen electrodes. The pressure of H2 is 1.00 atm in each hydrogen electrode. One of the electrodes is immersed in a solution with [H+] = 1.0 M and the other in a solution with 0.62 M NH3. What will be the value of Ecell? (Hint: First, you need to calculate [H+] for the NH3 solution.) Enter your answer with 3 significant digits. Enter scientific notation as 1.23E4.
A gaseous mixture containing 0.220 mol fraction of carbon tetrachloride (CCl4) and 0.780 mol fraction of dry air is initially at 75.0°C and 1117 mmHg
hammered into a thin sheet to be used as aluminum foil. If the thickness of the aluminum foil is uniformly 13 um, what area of aluminum foil (in cm^2) can be made? The density of aluminum metal is 2.969 g/cm^3.
a volume of 80.0 ml of rm h2o is initially at room temperature 22.0rmcircc. a chilled steel rod at 2.00rmcircc is
If 3.20mL of vinegar needs 41.5mL of 0.150 molarity NaOH to reach the equivalence point in a titration, how many grams of acetic acid are in a 1.50qt sample of this vinegar?
Calculate the pH at the equivalence point in titrating 0.120 M solutions of each of the following with 8.0* 10^-2 M NaOH
Draw the crystal-field energy level diagram for the 3d obitals and show the placement of d electrons assuming this is a weak-field complex ion.
Calculate the electron affinity in kJ/mol for X in the hypothetical ionic compound MX from the information given below.
All numerical answers must be reported to the correct number of significant figures. What volume of 1.000 M LiCl must be diluted with water to prepare 250.0 mL of 0.100 M LiCl
In a particular redox reaction, Cr is oxidized to CrO42 and Ag is reduced to Ag. Complete and balance the equation for this reaction in acidic solution. Phases are optional.
Consider the decomposition of calcium carbonate. Assume that ?H° = 177.8 kJ/mol and ?S° = 160.5 J/K·mol for the temperature range. CaCO3(s) -> CaO(s) + CO2(g)
A system receives 729 J of heat and delivers 4,104 J of work to its surroundings. What is the change in internal energy of the system (in J)
A graduated cylinder contains 20.5 mL of water. What is the new water level after 27.3 g of silver metal with a density
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