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The DOT regulation at 49 CFR 174.450 previously stipulated that when fire occurs in a domestic rail shipment of charcoal in transit, water should not be used if it is practicable to locate and remove the burning charcoal. Any charcoal that becomes wet while a fire is being extinguished must be removed from the car and not reshipped, and the remaining charcoal must be held under observation in a dry place for at least 5 days before forwarding.
What is the most likely reason DOT regulates the domestic transportation of charcoal in this fashion? What chemical reaction is involved here?
A 1.200 gram sample of C7H6O2 was dissolved in 11.42 grams of lauric acid, and it was determined that the freezing point of the lauric acid was lowered by 1.680 Celcius.
No desiccator is available. the sodium carbonate is cooled to room temperature, but the humidity in the room is high. how will this affect the reported molar concentration of the hydrochloric acid solution. Will it be too high, too low, or unaffec..
Problem- What is the volume of the Hope Diamond, the world's largest blue diamond at 44.4 carats. (1 carat = 200 mg)
how many liters of pure oxygen gas measured at 45.2 oc and 104.0 kpa are required for the complete combustion of 5.60
Define and show the chromatographic behavior comparison of fluorene and fluorenone. Illustrate spectral features comparison.
Dinitrogen pentoxide, N2O5, decomposes by first-order process with a rate constant of 3.7 x 10-5 s-1 at 298K. a) What is the half-life in hours for the decomposition of N2O5 at 298 K
How much 5.90 M NaOh must be added to 590.0mL of a butter that is 0.190 m acetic acid and 0.0260 m sodium acetate to raise the pH
how much water would they have consumed? How many kJ would be required to bring it to body temperature? (We noted in class that the amount of heat necessary to melt snow is 6.01 kJ/mol)
Compute the change in internal energy of the following system a balloon is cooled by removing 0.652 kJ of heat. It shrinks on cooling as well as the atmosphere does 385 J of work on the balloon.
Octane has a vapor pressure of 40. torr at 45.1 degrees celcius and 400. torr at 104.0 degrees celcius. What is its heat of vaporization (R=8.214 J/K mol)
A certain weak base has a Kb of 7.40 x 10^-7. What concentration of this base will produce a pH of 10.06
Utilizing standard enthalpies of formation, find out how much heat is released when 25.0g of CH4 is subjected for combustion is excess O2? All reactants and products are gases.
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