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Radioactive radon gas (222Rn) enters an average building at a rate of 5 picocuries per second per square meter of foundation area. Consider a house with a foundation of 400 square meters and a volume of 1000 cubic meters. Assume the house if well designed for energy conservation so that the ventilation rate is low and only one tenth of the air in the house is exchanged with outdoor air every hour. What will be the average steady state concentration of 222Rn (in Ci/cubic meter) in the house?
Determine the mass of snow that can be completely melted - Determine the mass of snow (frozen water) that can be completely melted with the application
What is the identity of the atom A When a solution containing .634 grams of ACl 3 was permitted to combine with an excess of aqueous silver nitrate AgNO 3
Calculate how the amount of AgCl(s )will change when the equilibrium is disturbed by Adding AgNO 3
Question enthalpy and entropy values are given and were asked to find boiling point of mercury
What is the average speed of the sprinter if A sprinter set a high school record in track and field, running 200. M in 22.0s .express your answer in kilometers per hour?
Determine which metal will reach the lowest temperature If the same amount of heat is added to both the metals?
Describe how this observation is consistent with the law of conservation of charge.
Determine what mass of sulphuric acid would be needed to mix with 0.75 mol of sodium hydroxide(NaOH)?
Dehydration upon heating with concentrated sulphuric acid without carbocation rearrangement?
Compute the expected change in temperature for 1.7 grams of ammonium nitrate NH 4 NO 3 dissolved in 50.0 mili litres of water H 2 O.
A mass of 57 g of lead fishing weight absorbs heat of 146 Calories. Determine its final temperature If its initial temperature =48 Centigrade,?
determine at what pressure will pure H 2 O start to boil if its temperature is seventy five degree Celsius
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