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The rate constant for the second order reaction 2NO2 ® N2O4 is 2.79 L/mol ·min at 48 oC. If the initial concentration of NO2 is 1.05 M , what is the half-life? A) 20.5 s B) 10.3 s C) 0.341 min D) 176 s
Calculate the amount of heat liberated (in kJ) from 405 g of mercury when it cools from 94.0°C to 14.0°C.
The Ksp of AgCl at 25oC is 1.0 x 10^-10. Calculate the concentrations fo Ag+ and Cl- in a saturated solution of AgCl, and the molar solubility of AgCl.
If a solution containing 17.76 g of mercury(II) perchlorate is allowed to react completely with a solution containing 5.102 g of sodium sulfate, how many grams of solid precipitate will be formed.
In the early days of the periodic table, the 1870s, both silicon and tin were known elements, but germanium was unknown. Using these trends and the densities of silicon and tin that you just obtained, estimate the density of germanium?
A volume of 80.0 mL of a 0.520 it M HNO_3 solution is titrated with 0.590 it M KOH. Calculate the volume of KOH required to reach the equivalence point?
The basic Salt sodium acetate, CH3COONa, is completely soluble in water. What is the pOH of a 0.25 M solution of sodium acetate?
Draw any one of the skeletal structure of a secondary alkyl bromide with a molecular formula C6H13Br and two stereogenic centers.
Three gases (8.00 of methane, CH4, 18.0 of ethane, C2H6, and an unknown amount of propane, C3H8) were added to the same 10.0-L container. At 23.0 degrees Celsius, the total pressure in the container is 3.50 atm. Calculate the partial pressure of e..
Which of the following is the correct pH of a 211.7 mL solution (final volume) of pure water after 52.3 mL of 1.00 mM HCl was added
Some velomobile seats have been designed to hold ice packs inside their cushions. If you started a ride with ice packs that held 1700 g of frozen water at 0 degrees C , and the temperature of the water at the end of the ride was 32 degrees C.
Write two balanced half reactions for the titration of iodine with sodium thiosulfate. Indicate what is being oxidized and what is being reduced.
What is w per mole for a reversible isothermal expansion of an ethane from 5-10 L/mol at 298k assuming a) ethane is an ideal gas and
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