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A toxic heavy metal has a whole body half-life of about 16 years. a) The ADI (RfD) of this metal for food is 2.3 × 10-3 mg kg-1 d-1. What is the acceptable daily intake for a 75 kg person? b) What is the whole body level of this metal if ingestion were maintained at ADI? [Hint: Atmospheric residence time analysis calculations are very similar.]
the specific heat of aluminum 0.22 calg degrees c. determine what would be the final temperature if thirty grams of al
Which of the isomers of octane has only two peaks in its 13C NMR? Draw the structure of the alkane. 2. Draw the structure of the C4H9Cl isomer given the following proton NMR data:
a solution is made by dissolving 25g of nacl in enough water to make 1.00 l of solution. assume that the density of the
What is the structure of the compound
Starch and cellulose are both made of chains of glucose units. The human body can digest starch but why can it not digest cellulose
In an experiment 20ml of 0.20M NH4OH is titrated with 0.25M HCl. What is the pH at the equivalent point
an ice calorimeter can be used to determine the specific heat ofa metal. a piece of hot metal is dropped into a weighed
Draw a cooling curve for a sample of steam that cools from 110 degrees C to -10 degrees C. indicate the segments of the graph that correspond to each of the following: a)solid; b) freezing; c) liquid; d) condensing; e) gas.
a 16 ounce speciality coffee drink contains 254 mg caffeine. if allthe caffeine is extracted and dissolved in an equal
If a reaction vessel initially contains only CO and NH3 at concentrations of 1.00 Mand 2.00 M, respectively, what will the concentration of HCONH2 be at equilibrium
The heat of combustion of ethanol, C2H5OH(l), is -1367 kj/mol. A batch of Sauvignon Blanc wine contains 10.6% ethanol by mass. Assuming the density of the wine to be 1.0 g/mL, what is the caloric content due to the alcohol (ethanol) in a 6-oz glas..
Calculate the entropy and the free energy of mixing for ethanol and water at 25c if the mass percent of ethanol is 15
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