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A hypothetical reaction X + 2Y ® Products is found to be first order in X and second order in Y. What are the units of k, the specific rate constant, if reaction rate is expressed in units of moles per liter per second? A) M•s-1 B) M-2•s-1 C) M-3•s D) M2•s-1
If the pH of a solution is 4.2 (at 25 degrees C) what is the hydronium and hydroxide ion concentrations, and the pOH of the solution
Calculate the mass of urea that should be dissolved in 225 g of water at 35°C to produce a solution with a vapor pressure of 37.1 mmHg.
What is the electron configuration of the atom in the third row of the periodic table that has the smallest ionization energy?
A compound containing only C, H, and O, was extracted from the bark of a sassafras tree. The combustion of 91.3 mg produced 248 mg of CO2 and 50.8 mg of H20. The molar mass of the compound was 162 g/mol. Determine its empirical and molecular formu..
What is the freezing point of a solution containing 3.10 grams benzene (78.11 g/mol) dissolved in 32.0 grams paradichlorobenzene
calculate the energy of a photon of light with a wavelength of 360nm.
A 100.0-L flask contains a mixture of NO2 gas and CO gas. If the concentration of NO2 is 5.5 × 105 ppm, and the total pressure is 790 torr, what is the partial pressure of CO in the flask?
If the pressure exerted by ozone, O3, in the stratosphere is 3.0 times 10^- 3 atm and the temperature is 254 K, how many ozone molecules are in a liter?
Iron can be prepared by the reaction of Fe2O3 with carbon according to the equation: 2Fe2O3(s) + 3C(s) 3CO2(g) + 4Fe(s) If 401 g Fe2O3 and 205 g C are heated together, how many grams of iron could be produced?
use oxidation number to show which element is oxidized and which element is reduced in this equation 2H2o2----2H2O+O2
what is the ph solution obtained by mixing 25.00 ml of 0.250 ml HCl and 25.00ml of 0.125M NaOH
A voltaic cell is constructed by immersing a strip of silver in a 1.0M AgNO3 solution and a strip of cadmiun metal in a 1.0M Cd(NO3)2 solution. The circuit is completed by a wire and a salt bridge in the usual way. Write the balanced half-reaction..
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