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What are the various forms of radiation emanating from the disintegration of atomic nuclei? What are the differences? How would you rank them in terms of danger to human health?
One encloses a mixture of helium and oxygen. Depict a chemical system at equilibrium when ammonia gas has partially decomposed into hydrogen and nitrogen gas.
Assume that a particular reaction evolves 224kj of heat and that 24kj of work is gained by the system. what are values of delta E and delta H for the system
1.75 pounds of pasta dough with a density of about .84g/cm^3 how many feet of 2" wide, 1/32" thick lasagna noodles can be made
question a student placed 10g of mgoh2 into a flask and added 500 ml of water. the student then took 100 ml of the
The digital thermometer is miscalibrated by +0.15C over its entire range. If the same thermometer is used in part B.2 will the reported moles of solute
Which of the following elements would have the greatest ionization potential (require the most energy to remove one electron) within this set? Cs, Ca, Co, Si, O
Draw the structure of each product obtained when the given compound is treated with the reagent specified below: a. CH3C(=O)CH2CH2C(=O)OCH3 (1,4-dioxacyclohexane compund) + HBR (reagent)
the common eastern mole a mammal typically has a mass of 69 g which corresponds to about 6.9 moles of atoms. a mole of
Draw a typical force vs. distance (approach and retract) curve and explain how particular features correspond to different forces exerted between tip and sample
Caffeine (C8H10N4O2) is a stimulant found in coffee and tea. If a solution of caffeine in chloroform (CHCl3) as a solvent has a concentration of 0.0900 m, calculate the the percent caffeine by mass and the mole fraction of caffeine.
If 16.87 grams of nitric acid are reacted with a large amount of aluminum metal, what volume of hydrogen gas would be produced at STP?
An aqueous solution of sodium chloride contains 4.50g of CaCl2, per liter. What is the molarity of CaCl2? When calcium chloride dissolves in water, the calcium ions
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