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Using the standard enthalpies of combustion, calculate the standard enthalpies of the following reactions:
A. C2H5OH(l)+3O2(g)>2CO2(g)+3H2O(l)
B. C2H5OH(l)+2O2(g)>2CO(g)+3H2O(l)
C. C2H5OH(l)+O2(g)>2C(s,graphite)+3H2O(l)
A 4.10 g nugget of pure gold absorbed 292 J of heat. The initial temperature was 28.0°C. What was the final temperature.
Gold (Au) crystallizes in a cubic close-packed structure (the face-centered cubic unit cell) and has a density of 19.3 g/cm3. Calculate the atomic radius of gold in picometers.
What mass of sucrose (C12H22O11) should be combined with 494 g of water to make a solution with an osmotic pressure of 9.00 atm at 320 K?
If a 88.2 gram charcoal briquette (assume pure carbon) is burned in an excess of oxygen, what mass of CO2 is produced by the reaction
Explain how effective clean coal technologies are with regard to reduction in carbon dioxide pollution levels and minimization of the carbon footprint.
degress Celcius and 1 atm enters a coller in which 55% of the feed is condensed at a constant pressure. What is the temprature at the condenser outlet and explain?
Draw a phase Diagram (label axes), showing normal boiling boint, critical temperature (b) define critical temperature
Use Coulomb's law to calculate the ionization energy in kJ/mol of an atom composed of a proton and an electron separated by 270.00 pm.
CO(g)+2H2(g)->CH3OH(g) How many moles of each reactant are needed to produce 3.60 X 10^2g of CH3OH?
Calculate the pH of a solution prepared by mixing 20.5mL of a 0.500M sodium fluoride solution with 32.5mL of a 0.750M hydrofluoric acid solution.
The process of water freezing to form ice at 0 degrees C is a. neither exothermic nor endothermic. b. an endothermic phase change. c. an exothermic chemical reaction. d. an exothermic phase change. e. an endothermic chemical reaction.
The approximate distance between mars and earth is about 1.29 x 10^8 miles. How many seconds would it take for TV pictures transmitted from the viking space vehicle on mar's surface to reach earth ? enter your answer in scientific notation
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