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Three common hydrocarbons that contain four carbons are listed here, along with their standard enthalpies of formation:
C4H6(g) 111.9 kJ/mol
Calculate the molar enthalpy of combustion to CO2(g) and H20(l)
A nurse administered 3.50mL of a radioisotope solution that has an activity of 135pCi/mL. What total dose of the radioisotope did the patient receive
A zero-order reaction has a constant rate of 2.00×10-4 . If after 50.0 seconds the concentration has dropped to 6.00×10-2 , what was the initial concentration?
How is the rate of disappearance of ozone related to the rate of appearance of oxygen in the following equation: 2 O3 (g) ? 3 O2 (g) (rate expression)
calculate the ph of a 0.070 M sodium acetate CH3COONa and 0.020M acetic acid CH3COOH buffer The ka is 1.7x10^-5
Cyclohexanol, C6H12O, has a heat of combustion of -890.7 kcal/mol. A sample containing only 0.708 g of cyclohexanol undergoes complete combustion in a bomb carlorimeter that has a heat capacity
if an athlete expends 1850KJ/h (kilojoules per hour), how long does he have to exercise to work off 1.0lb of body fat?
A lactic acid/lactate ion buffer solution contains 0.44M HC3H5O3 and 0.90 M C3H5O3^-, respectively. The K a value of lactic acid is 1.4times 10^-4. Calculate the pH of this buffer.
Write a reaction mechanism for the reaction of 1-chloropentane with NaHS using dimethylformamide as the solvent. Draw the structure of the reaction intermediate clearly showing its geometry.
How many moles of ammonium ions are released when 1.6 mol of ammonium phosphate, (NH4)3PO4, is dissolved in water?
How much heat does it take to change solid ice at 0 degrees Celcius to steam at 100 degrees Celcius?
An unknown metal chloride has the formula MClx. The addition of 28.9 mL of 0.432 M aqueous lead (II) nitrate to 26.7 mL of 0.311 M aqueous MClx causes all the lead ions and chloride ions present in solution to precipitate out as lead (II) chloride
The element antimony has an atomic weight of 121.757 amu and only two naturally occuring isotopes. one isotope has an abundance of 57.3 % and an isotopic mass of 120.904 amu based on these data what is the mass of the other isotope.
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