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Write electron configurations for the following ions, and determine which have noble-gas configurations. Explain your answer. (a) Cr^3+ (b) N ^3- (c) Sc^3+ (d)Cu^2+ (e)TI^+ (f)Au^+
Calculate the concentration of NO3- ion remaining in solution.
A 255-mL sample of HCl solution reacts with excess Mg to produce 14.0 L H2 gas at STP. What is the molarity of the HCl solution?
The vapor pressure of benzene (C6H6) is 40.1 mm Hg at 7.6 C. The delta H vap=31.0 KJ/mol, what is benzene's vapor pressure at 60.6 C?
A running automobile produces CO at a rate of 188g CO per hour. A car is left idling in a garage 5.2m long, 4.0m wide, and 2.2 m high at 20 degrees C. How long would it take to build up a lethal concentration of CO of 1000 ppmv?
Draw a diagram for this cell and identify the cathode (including the identity of metal), anode (including the identity of metal), direction of electron flow, salt bridge, and ions present in solutions.
Calculate the change in entropy (in J/K) for the following reaction at 298 K: C(s) + H2O(g) ? CO(g) + H2(g) Use entropy for graphite (diamond is too expensive).
What is the pressure of a gas if you compressed the gas from it's original 500mL at 3.4 torr to a volume of 302mL?
What is the composition of this mixture on a %, by mass, basis? Show all calculations; report answer to the maximum number of significant figures possible
When determining the acid content in prepared yellow mustard by adding NaOH and water, how do you find the mass of CH3CO2H reacted?
Calculate the pH of each of the following buffered solutions. to 1.00 L of each of the four solutions. (a) 0.100 M propanoic acid (HC3H5O2, Ka= 1.3 10-5) (b) 0.100 M sodium propanoate (NaC3H5O2)
Example: Determine the solubility of calcium fluoride at 25C. And Be sure to note the difference between Solubility and Solubility Product Constant ! What could we do to change the system and produce a precipitate?
the reaction of a particular alcohol with a carboxylic acid is 3.83. What is the calculated yield of the ester?
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