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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 0.640 mol/min,
A) 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.
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.
Consider the following reaction at constant P. Use the information here to determine the value of ?Ssurr at 355 K. Predict whether or not this reaction
Predict whether the entropy change in the system is positive, negative or close to zero for each of the following processes
Using the average initial pH of your acetic acid solutions, and the average molarity of those solutions, calculate a value of Ka for acetic acid. when initial pH is 2.63 and average molarity is 0.06475.
Devise a suitable reaction sequence in which each of the following compounds can be prepared from benzene in good yield. Assume ortho and para isomers are separate from one another, and use any other reagents you desire.
Titration of the newly freed EDTA required 18.0 mL of 0.0210 M Ca2 . What were the molarities of Cd2 and Mn2 in the original solution?
Which of the following is a neutralization reaction?
Why is it possible to separate the product (6-ethoxycarbonyl-3,5-diphenyl-2-cyclohexenone) from sodium hydroxide using acetone?
Determine the activation barrier for the reaction.
A second-order reaction of the type A+2Bâ†'P was carried out in a solution that was initially 0.050 mol dmâˆ'3 in A and 0.030 mol dmâˆ'3 in B. After 1.0 h the concentration of A had fallen to 0.010 mol dmâ
Calculate the pH for the soluton after addition of solid sodium formate to cause the formate ion (CHOO-) to increase to 0.2 M
Describe clearly why a single indicator solution in only useful for measuring pH over a rather narrow range. Use a specific indicator of solution
the normal boiling point of menthanol is 64.7 degrees celcius, and its molar enthalpy of vaporization is 71.8 kj/mol. Calculate the value of delta S when 1.00 mol of CH3OH (liquid) is vaporized at 64.7 degrees celcius.
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