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Categorize each of the following as an element, a compound, or a mixture.
(a) sterling silver
(b) carbonated mineral water
(c) tungsten
(d) aspirin
write a chemical equatin representing the third ionization energy for lithium. use e- as the symbol for an electron
Use the reactions below and their equilibrium constants to predict the equilibrium constant for the reaction, 2A(s) 3D(g).
Calculate the molarity of an NaOh solution if 32.6 ml of this solution is required to neutralize 0.854g of potassium hydrogen phathalate. the molecular weight of potassium hydrogen phathalate is 204.277g/mol
The rate law for the reaction, 2NO(g) + O2(g) -- 2NO2(g), is found to be: rate of reaction=k[NO]2[O2]2 (PLEASE note that the 2's after the concentrations are powers, so we have NO to the power of 2 and O2 to the power of
A buffer solution contains 0.1 M CH3COOH and 0.1 M sodium acetate (that is, it has 0.2 M total buffering components of acetic acid + acetate). Calculate the pH after addition of 4 mL of 0.025 M HCl to 10 mL of the buffer. The pKa for acetic acid i..
Calculate the pH of a buffer solution made by mixing 49 ml of a 0.07 M ammonia solution with 52 ml of a 0.10 M ammonium nitrate solution. Give the pH to two decimal places.
The hydrogen gas generated is collected over water at 25.0°C. The volume of the gas is 535 mL measured at 1.00 atm. Calculate the number of grams of sodium used in the reaction. (Vapor pressure of water at 25°C = 0.0313 atm.)
Fe3O4(s) + 4CO(g) --> 4CO2(g) + 3Fe(s). In this reaction, if 335.2 g Fe3O4 is reacted with excess CO, what mass of CO2 will be produced.
Suppose a 500mL solution contains 2.00 millimoles of Co(NO3)2, 150.0 millimoles of NH3, and 150.0 milllimoles of Ethylendediamine (en). What is the concentration of Cobalt 2+ (aq) in the solution?
The rate constant (k) for a reaction was measured as a function of temperature. A plot of ln k versus 1/t (in K ) is linear and has a slope of ?1.13×10^4 K.
If a container having a volume of 322mL at 25.o degrees celcius was to suddenly reduce to 75.0mL, what would be the new temp.(n,p constant)?
If the current price of 30. g of vanillin is $112, determine the cost to supply enough vanillin so that the aroma could be detected in a large aircraft hangar with a volume of 3.8 x 10^7 ft^3.
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