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Using standard enthalpies of formation from Appendix L, calculate ?Ho for the following reaction: 2 C6H6(l) + 15 O2(g) --> 12 CO2(g) + 6 H2O(g) b. How many grams of C6H6(l) must be combusted in the above reaction to produce 2570 kJ of heat energy?
Values BelowC6H6(l) 48.95O2(g) 0CO2(g) -393.509H2O(g) -241.83
The GMC Sierra 15 Hybrid 2WD, a hybrid electric vehicle, has an EPA gas mileage rating of 23.0 mi/gal on the highway. How many kilometers can the Sierra 15 Hybrid 2WD travel on the amount of gasoline
A 1.0 dm^3 glass bulb contains 1.0x10^23 H2 molecules. If the pressure exerted by the gas is 100 kPa, what is (a) the temperature of the gas, (b) the root-mean-square speeds of the molecules, (c) Would the temperature be different if they were O2 ..
Calculate Keq for 2 moles of electron(s) in each half-reaction and a standard potential of 0.12 V. Calculate Keq for 2 moles of electron(s) in each half-reaction and a standard potential of (-0.54) V.
An unidentified organic compound X, containing C,H, and O was subjected to combustion analysis. When 228.4 mg of pure X was burned 627.4 mg of CO2 and 171.2 mg of H2O were obtained.
For the following molecules and ions, draw a Lewis structure, calculate formal charges for each atom, and determine the oxidation number for each atom.
The pressure on a balloon holding 350 mL of an ideal gas is increased from 254 torr to 1.00 atm. What is the new volume of the balloon (in mL) at constant temperature?
the atomic weight of a newly discovered el- ement is 98.225 amu. it has two naturally occuring isotopes. one isotope
A ground state hydrogen atom absorbs a photon of light having a wavelength of 93.06 nm. It then gives off a photon having a wavelength of 1.0 × 103 nm.
a gaseous mixture of and contains 34.8 nitrogen by mass. what is the partial pressure of oxygen in the mixture if the
an automobile gasoline tank holds 49 of gasoline. when the gasoline burns 172 of oxygen are consumed and carbon dioxide
A 0.75 L bottle is cleaned, dried, and closed in a room where the air is 22 degree Celsius and 44% relative humidity (that is, the water vapor in the air is 0.44 of the equilibrium vapor pressure at 22 degree Celsius). The bottle is brought outsid..
In the emission spectrum of helium, there are strong lines at wavelengths of 447.1 nm, 501.6 nm, and 587.6 nm. Using the Balmer-Rydberg equation, determine the values of nf for each emission.
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