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A person ate 0.999 pound of cheese (an energy intake of 7990 kJ). Suppose that none of the energy was stored in his body. What mass (in grams) of water would he need to perspire in order to maintain his original temperature? (It takes 44.0 kJ to vaporize 1 mole of water.)
A 0.300-M solution of X (Mm = 171 g/mol) has a density of 1.096 g/ml. What is the molality of X in the solution?
Determine how you would make a 100ppb solution of riboflavin from a 50mg/L stock solution. Do the same for preparation of a 500ppb solution from a 50mg/L stock solution
What chemical tests might be used to ditinguish between pentanal and 2-pentanone; between benzyl alcohol and diphenylmethanol?
Use the graph from the Introduction that plots the density of ethanol solutions from 20 to 60 mass percent to answer the following questions:
What is the overall order of the reaction?
For a reaction of hydrogen with iodine, the rate constant is 2.45*10^-4 L mol-1 s-1 at 302 C and 0.950 L Mol-1 s-1 at 508 C.
a rectangular block of plastic, measuring 1.50 cm by 2.29 cm by 1.84 cm, floats in the middle of the Pacific Ocean. The volume of sea water displaced by the plastic block is 5.46 cm3. Assuming the density of the sea water is 1.025 g/mL, what is th..
the maximum kinetic energy of the emitted photoelectrons and (b) the speed of photoelectrons having this maximum kinetic energy.
Using A flow diagram, show the separation of a mixture containing p-bromoacetanilide, N-cyclopentyl-N-methyl-N-propylamine (N means the group is attached to the nitrogen of the amine) and m-nitrophenol.
What is the the structures of both products and how can you distinguished them using IR spectroscopy?
Calculate the pH of of a solution prepared by mixing 60.0 mL of 0.160 M HCl with 15.0 mL of water. How much antacid containing 400.0 mg of Mg(OH)2 in 5 mL of water is needed
The accepted toxic dose of mercury is 300ug/day (micrograms per day). Dental offices sometimes contain as much as 180ug of mercury per cubic meter of air. If a nurse working in the office ingests
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