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A) The Occupational Safety and Health Administration has set the limit on the maximum percentage of carbon dioxide (CO2) in air a worker can breathe at 0.500% by mole. If dry ice (solid CO2) is sublimating (becoming a gas) in a room at a rate of 0.150 mol/min, what is the minimum rate that fresh air has to be supplied to the room so that the concentration of CO2 in the room doesn\'t exceed 0.500% by mole? Assume the room is well mixed, and the volume of the solid dry ice does not change. (in mol air/min)
B) What is the percent by mass of oxygen in a gaseous mixture whose molar composition is 0.500% CO2 and 99.500% air? The composition of air is 21% mole O2, 79% mole N2, and has an average molar mass of 29.0 g/mol. (% O2 by mass)
Determine the molecular formula of the compound at the temperature of 120 degrees celsius and Pressure 750 mm hg, if 1 l of the gaseous compound weighs 2.3 grams? '
With respect to the corrosion of steel in concrete, explain the significance of the following terms: carbonation of concrete, passivity of steel, electrical resistivity of concrete, state of oxidation of iron.
The specific heat of liquid water is 4.184 J/g x C. Calculate the energy required to heat 10.0 g of water from 26.5 C to 83.7 C.
What volume of a concentrated { HCl} solution, which is 36.0% { HCl} by mass and has a density of 1.179 {g/mL}, should be used to make 5.30L of an {HCl} solution with a {pH} of 1.7.
What is the osmotic pressure of a solution made from dissolving 85.0g of glucose in 800ml of water at 19.0 C.
Assuming that the water is contaminated, devise a method for disposing of the contaminated water without contaminating the environment, but allowing the recycling plant to resume operations as soon as possible.
A metal, M, was converted to the chloride, MCl2. Then a solution of the chloride was treated with silver nitrate to give silver chloride crystals
When burned in oxygen, 10.0 g of phosphorus generated enough heat to raise the temperature of 2950 g of water from 18.0oC to 38.0oC. The heat of formation of P4O10 from P4(s) and O2(g) is:
When 50 mL of water contains 0.50 moles HCl at 22.5 degrees celsius is added to 50.0mL of water containing 0.50 mol NaOH at 22.5 degrees celsius in a calorimeter, the temperature of the solution increases to 26.0 degrees celsius.
Define the possibility of stereoisomers exists, However, the addition of bromine to an equimolar mixture of cis- and trans-2-butene generates only three stereoisomers. Explain.
Organic Chemistry Lab: Reduction and Spectroscopy, 1. Sketch the NMR spectrum you would expect to observe for the following compounds:
2I2 + N2H4 → 4HI + N2 a. How many grams of I2 are needed to react with 36.7 g of N2H4?
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