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First Order Kinetics: A worker in a hazardous waste recycling facility inhales and absorbs toulene at a rate of 22 micrograms / hour. He excretes 2 L per day containing 18 micrograms / liter toulene. If the blood volume of the individual is 5.6 L and the toulene is metabolized with a first order rate constant of 0.08 h^-1 what is the steady-state concentration of toluene in the individual's vascular system? Assume that storage is negligible.
If this arsenic is present as arsenate, AsO4^3-, what mass of sodium arsenate would be present in a 1.10L sample of drinking water that just meets the standard. Parts per billion is defined on a mass basis as ppb = g solute/g solution 10^9
In a separate experiment, all the sulphur in another 0.464 g sample was converted to 0.859 g of BaSO4. What is the empirical formula of the unknown compound
1.list all the strong aqueous acids. what is the difference between a strong acid and a weak acid? how do the
when mixture A at 273 K is heated to 473 K, mixture B results. How many different chemical changes occur? How many different physical changes occur?
Calculate the pH of 0.500L of a buffer solution composed of 0.20 M butyric acid (CH3(CH2)2)2COOH, Ka = 0.000015) and 0.10 M sodium butyrate, (NaCH3(CH2)2COO).
A tertiary alkyl halide reacts with a weak base and nucleophile. The reaction will proceed via which of the following mechanisms? A) SN1 B) SN2 C) E1 D) E2 E) SN1 and E1
Calculate the number of grams of alcohol present in 1.00 L of 69 proof gin. The density of ethanol is 0.798 g/mL.
Consider a glass of 171 mL of water at 29°C. Calculate the mass of ice at -15°C that must be added to cool the water to 10°C after thermal equilibrium is achieved.
What is the mass of platinum required to solidify all the gold? What is the change in entropy of the system? Cp(Pt, s) = 25.86J/mol*K ?H?fus(Au, s l) = 12550J/mol
(b) calculate the moles of each gas before the reaction (c) determine the limiting reactant (d) calculate the moles of ammonia produced (e) calculate the partial pressures of all species in the system (f) the total pressure in the system
Fears of radiation exposure from normal use of such detectors are largely unfounded. Identify reasons why ^241Am smoke detectors are perfectly safe.
A solution is 0.05 M in Cr2O7^-2 and 0.003 M in Cr3-. If the pH is 4.0, What is value of the potential of the half reaction?
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