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The world burns approximately 9.0x10^2 kg of fossil fuel per year. Use the combustion of octane as the representative reaction and determine the mass of carbon dioxide(the most significant greenhouse gas) formed per year by this combustion. The current concentration of carbon dioxide in theatmosphere is approximately 387 ppm (by volume). By what percentage does the concentration increase in one year due to fossil fuel combustion? Approximate the average properties of the entire atmosphere by assuming that the atmosphere extends from sea level to 15 km and that it has an average pressure of 381 torr and average temperature of 275 K. Assume Earth is a perfect sphere with a radius of 6371 km.
What was the initial concentration of COCl2?
Determine what volume of N 2 is released at 0.915atm of pressure and at the temperature of 25 degree celcius from a tank full of liquid N 2 ? (d=0.808g/mL)
A certain sunstance, intially present at 0.0800 M, decomposes by zero-order kinetic with a rate constant of 2.50 x 10-2 mol/l s. Calculate the time (in seconds) required for the system to reach a concentration of 0.0630
A saturated solution of PbCl2 in water was prepared and filtered. From the filtrate, 1.0 L was measured out into a beaker and evaporated to dryness. The solid PbCl2 residue recovered in the beaker amounted to 0.0162 moles. What is Ksp for PbCl2
how many grams of sodium sulfide are formed if 1.60 g of hydrogen sulfide is bubbled into a solution containing 2.13 g
We know Pro can interrupt an a-helix, chemically, do you think it will cause any unusual problems in the determination of, angiotension II sequences? Explain.
Determine the percent yield for the reaction between 45.9g of NaBr and excess chlorine gas to produce 12.8g of NaCl and an unknown quantity of bromine gas.
At 25oC, the vapor pressure of the cyclohexane liquid "C6H12" is 70.0 mmHg and that of the toluene liquid "C7H5CH3" is 22.0 mmHg. The mole fraction of toluene in an ideal solution of cyclohexane and toluene that has a vapor pressure equals to 53.2..
A water treatment plant has a flowrate of 40,000 m3/d. If the overflow rate is 25 m3/d/m2, determine the following:
What is the density of hydrogen gas at 23.0^C and a pressure of 1640 psi?
To what volume should you dilute 130. mL of an 7.11 M CuCl2 solution so that 65.0 mL of the diluted solution contains 4.24 g CuCl2?
Potassium iodide is added to common table salt, sodium chloride, to help prevent the enlargement of the thyroid gland, a condition known as goiter.
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