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A sample of solid aerosol is collected from a rural area and found to have as composition Al=2400 mg kg-1 and Pb 3.4 mg kg-1. Utilizing data for the crustal abundance of elements compute the chemical concentration factor for lead. Explain what might the reason for a value such as you have obtained?
explain how to correct for the partial of water vapor when calculating the partial pressure of a dry gas is collected
If Delta H = -80.0 KJ and Delta S = -0.200 KJ/K, the reaction is spontaneous below a certain temperature. Calculate that temperature.
The contents of one 80. lb bag of topsoil will cover 30. square feet of ground to a depth of 1.7 in. What number of bags are needed to cover a plot that measures 600. by 700. m to a depth of 1.5 cm.
When you breathe the following reaction will take place: C6H12O6 (s) + 6O2 (g) --> 6CO2 (g) + 6H2O(g), how many moles of glucose are needed to produce 100.0 g of water?
an archaeological sample contains 0.743g of lead -206 and 2.145g of uranium - 238. Assume that all the lead now present in the rock came from the radioactive decay of the uranium and that no appreciable amounts of other radioactive nuclides are pr..
How many photons are required to heat 235 mL of coffee from 25.0 C to 62.0 C? Assume that the coffee has the same density, 0.997g/mol , and specific heat capacity, 4.184 J?g*K, as water over this temperature range.
What is meant by this term and how does an amphipathic molecule behave in water. Draw a diagram to illustrate
how much heat (in KJ) is required to warm 10g of ice, initially at -10 degree celsius, to steam 110 degree celsius?
if a 10.0 g sample of zns is treated with excess hcl what volume of hydrogen gas is evolved at stp?zn s 2 hcl aq -gt
uncle wilbur let me watch as he analyzed the iron content of runoff from his banana ranch. a 25.0-ml sample was
A solution containing copper (I), nickel, and Zinc cyanide complexes was eloctrolyzed, and a deposit of 0.175 grams was obtained. the deposit contained 72.8% Cu, 4.30% Ni, and 22.9% ZN. no other element or compound was released.
how many calcium carbonate tablets, each containing 500mg of the active ingredient are required to react with 49.9 grams of stomach acid containing 37.5%HCl by mass
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