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The U.S. Environmental Protection Agency (EPA) recommends that 222Rn levels not exceed 4 pCi per liter of air (1Ci=3.7x10^10 decay events per second; 1 pCi =1x10^-12 Ci). Convert 4.0 pCi per liter of air into concentrations units of 222Rn atoms per liter of air and moles of 222Rn per liter of air. Write out every step in your conversion and explain your answer.
A large CSTR, small CSTR and PFR of fixed volume are available. In general, how wouldyou arrange them for getting maximum conversion forreactions of order >1 and1 arrangement is PFR followed by small CSTR followed by large CSTR tomaintain the reac..
An overall average of 65,000 lb of water per 24-h day must be evaporated during each 30-day period. (b) An overall average of 81,000 lb of water per 24-h day must be evaporated during each 30-day period.
About 10 to 30 million cells at most can be made from a highly purified single hematopoietic stem/preprogenitor cell in vitro.
Is the proposed stead-state operation feasible - What is the corresponding length of wire that may be used in the heater for a maximum available voltage of 110V? What is the power rating of the heater?
An effluent disposal contractor is considering entering the recycled field. At present he incinerates an organic waste containing recoverable solvents and dumps the aqueous based effluent containing acids and metals.
Carbon tetrachloride (1) and water (2) are essentially immiscible liquids. A stream contains 80% CCl4 by mole and the remaining is water.
Suppose you pour a gallon of water on a yowling cat 10 ft below your bedroom window. (a) How much potential energy (ft · 1bf) does the water lose?
If a saturated solution of NaHCO3 at 60°C is cooled and comes to equilibrium at 30°C, what percentage of the dissolved salt crystallizes?
10g of steam at l00°C and a pressure of one atmosphere condensing into water at the same temperature and pressure. (The latent heat of vaporization of water is 22571 Jg^-1).
How will the mole fractions of benzene and toluene in the liquid change with time (increase, decrease, or remain constant)? Explain your answer.
Calculate the gross torque developed for a flux per pole of 0.02 Wb and an armature current of 50 A. (Note: The number of parallel paths is equal to the number of poles for lap windings.)
Using the information in the above table to show how the specific volume of each liquid varies with temperature. You should plot a graph for each liquid and use this graph to estimate the exact value of a at 50°C for each liquid.
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