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1. Discuss the similarities and differences that exist between the three basic types of occupational exposure limits (OELs). Describe how each type of OEL is used to control occupational exposures, and provide at least one specific chemical for which each type of OEL has been established. (200 words)
2. Describe how hazard notations are used to derive OELs, including the additional hazard notations included by the Occupational Safety and Health Administration (OSHA). How would these notations be used in industrial hygiene practice? (200 words)
3. Discuss the common elements used to derive occupational exposure limits (OELs). Provide your opinion as to which of the elements is the most important. (200 words)
A student takes 148. g of BaCl2, and reacts it according to the following equation: 3BaCl2 + Al2(SO4)3 → 3BaSO4 + 2AlCl3 How many moles of AlCl3 are formed?
Assume that you pipet twenty milliliters of 0.350 M CaCl2 into a fifty milliliter volumetric flask and add DI water to the calibration mark. What is the molarity of this diluted solution
Question- You need to prepare 100 ml of a pH = 4.00 buffer solution using 0.100 M Benzoinc acid (pka = 4.20) and 0.120 M sodium benzoate. How much of each solution should be mixed to prepare this buffer
A mixture of gases has the partial pressures of 0.308 atm due to He, .259 atm due to N2, and the rest is due to O2. If the total pressure of the mixture is 752 mmHg, what is the partial pressure due to oxygen?
At 295 K, Keq = 7.0 x 10-2 for the following equilibrium: NH4HS(s) ? NH3(g) + H2S(g) What is the equilibrium partial pressure (in atm) of H2S.
Find the magnitude of charge of C-F in CH3F, represented in units of e, given that the dipole moment is 1.847D and the bond length is 1.385angstroms.
CH4(g) + O2(g)= CO2(g) + H2O(l) is this an exothermic reaction? If 100 g of CH4 is burned, calculate the heat exchange
t-butyl bromide was dissolved in formic acid, H2CO2H, and incubated for to hours at 25oC for two hours. (A) Draw the structure of the product that formed.
Problem- if a solution contain a mixture of Ba^2 and Ag^+ ions, write a short experimental procedure that would allow the two ions to be separated and includes a confirmatory test for verifying the presence of each ion.
A tank of pressurized helium is used to inflate balloons at a circus. The tank contains 3.87 L of helium at a pressure of 1294.7 kPa. If the volume of a balloon is 2.2 L, how many balloons can be completely filled on a day where the atmospheric pr..
From each pair below, select the molecule that will display stronger intermolecular dipole-dipole forces in a sample of the pure substance.
What is the heat change of H 2 O If the final temperature of the mixture = 25 degree celsius?
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