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1. How many trees are required to offset the carbon dioxide emissions from an individual who drives 15000 miles every year at a fuel efficiency of 30mpg? Average tree removes 610 kg of CO2 every year, formula for gas is C8H18 with density of .73 mL Only products of combustion are CO2 and H2O.
2. New carpet is installed in the bedroom of a house is 15 feet by 12 feet by 10 feet. if the carpet emits formaldehyde gas at a rate of 4.3 x 10-6 mol/hour. How many hours will it take to exceed .10 ppm by volume?
3. How many kg of water must be processed to obtain 1.1 L of D2 at 25 degrees and .900 atm. D2 abundance is .015 and recovery is 80%
4. A 375 gallon tank is filled with water containing 168 g of bromine to form Br- ions. how many liters of CL2 gas at 1 atm and 20 degrees C will be rwquired to oxidize all the bromide to molecular bromine?
A sample consisting of 1.45 mol of perfect gas atoms is taken through the following cycle: step1 constant pressure, change in volume from 22.44L to 44.88L. Step2 Constant volume, change pressure from 1bar to .35bar.
Determine the ionic strength. Assume that all the salts completely dissolve and dissociates into their respective ions
A Cr^{3 + } aq solution is electrolyzed, using a current of 7.50 A}. What mass of Cr}( s) is plated out after 1.80 days? also What amperage is required to plate out 0.300 mol Cr from a Cr^{3 + } solution in a period of 7.20 h
When a 5.49-g sample of gaseous hydrogen bromide dissolves in 33.0 g of water in a coffee-cup calorimeter (see above figure) the temperature rises from 21.00 oC to 62.66 oC. Calculate H in kJ/mol HBr for the solution process.
Redox and Thermodynamics 1. Sketch galvanic cells based on the following overall reactions. Show the direction of electron flow, the direction of ion movement through the salt bridge, and identify the cathode and anode.
Calculate the pH of 100. mL of 0.31 M NH3 before and after the addition of 4.5 g of NH4NO3, and account for the change. Assume that the volume remains constant.
How might you use 13C NMR spectroscopy to determine if the brominated product is contaminated with some unreacted starting material (during the bromination of trans-cinnamic acid)
What is your sampling rate in ml/min if you collected, over a four hour sample
Producing hydrogen atoms from H2 molecules requires 436 kJ/mol to break H-?H bonds. For the longest-?wavelength photon capable of breaking a single H-?H bond, calculate
Using the formula W = mg, how many milliliters of water with a density of 1g/mL are required to weigh 0.75 newtons and g = 9.81 m/s2?
how much energy in kilojoules is required to convert 100 ml of water at its boiling point from liquid to vapor and how
1.770 g of a solid white acid are dissolved in water and completely neutralized by the addition of 36.96 ml of 0.437 m
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