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Whats the thermochemical equation that represent the formation of butane?
A sample of glucose, C6H12O6, contains 1.265 x 1021 carbon atoms. (a) How many atoms of hydrogen does it contain?
What is the pH of a buffer that results when 0.50 mole of Na3PO4 is mixed with 0.75 mole of HCl and diluted with water to 1.00 L? The acid dissociation constants for phosphoric acid
The titration of 0.50 M NH3 with 0.50 M HCL results in a final endpoint and a concentration of 0.25 M NH4 Cl with essentially all the NH3 complete conversion to NH4^
One piece of copper jewelry at 108 degrees Celsius has exactly twice the mass of another piece, which is at 44 degrees Celsius. Both pieces are placed inside a calorimeter whose heat capacity is negligible. What is the final temperature inside the..
The element M forms the chloride MCl4 containing 75.0% Cl by mass. What is the atomic weight of M?
Compute the change in temperature when 1 g sodium chloride is dissolved in 250.0 mL of water is initially at 27 C. The heat capacity of water is 4.184 J/mL/K. Neglect the heat capacity of the NaCl.
Describe the uniqueness principle and explain the three principal reasons why second period elements are notably different from their heavier counterparts.
When one mole of hydrogen iodide(HI) is stored in a 1-liter container at 444 oC, 22 % of HI wil be dissociated at equilibirum. Calculate the equilibrium constant of the reversible reaction of hydrogen iodide (HI)at 444 oC.
What is the term for an attraction between two molecules with temporary dipoles
If 67.0 mL of 0.119 mol/L NaOH(aq) and 35.0 mL of 0.193 mol/L HA(aq) are mixed, then what is [HA] at equilibrium? Assume that HA is a weak monoprotic acid with pKa=6.23 at 25oC.
if 5.00 grams of NaHCO3 decomposes, what is the mass of the carbon dioxide produced?
when taking a tlc plate and recording the Rf values what must you always write down in order for someone else to be able to reproduce your work
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