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A hiker caught in a thunderstorm loses heat when her clothingbecomes wet. She is packing emergency rations which if completelymetabolized will release 30kJ of heat per gram of rations consumed.How much rations must the hiker consume to avoid a reduction inbody temperature of 4.0K as a result of heat loss? Assume the heatcapacity of the body equals that of water and that the hiker weighs55kg.
the compounds magnesium oxide (MgO) and calcium sulfide (CaS) is 82.1% by mass calcium sulfide . The compound calcium sulfide is 55.6% by mass calcium. Calculate the mass (g) of calcium in the mixture.
Monochromatic light falls on any one of the diodes that comprise the detector array of your OcieanOptics spectrometer. The signal is directly proportional to what quality of the light that impinges on it?
Consider the titration of a 26.1 mL sample of 0.115 M RbOH with 0.110 M HCl. Determine each of the following.
A 4.50-g sample of LiCl at 25.0C dissovles in 25.0mL of water also at 25.0C. Th final equilibrium temerpature of the resulting solution is 60.8C
The density of air at ordinary atmospheric pressure and 25°C is 1.19 g/L. What is the mass, in kilograms, of the air in a room that measures 12.5 x 15.5 x 8 ft
Calculate the energy of an ultraviolet photon of wavelength 106nm and that of an infrared photon with a wavelength
For phenylanaline can be modeled as particle on a ring. Calculate the probability of finding electrons in one half of the ring from the ground state
A 0.200 L sample of H2 is collected over water at a temperature of 298 K. Atmospheric pressure is 99.00 kPa. Water has a vapor pressure of 23.00 Torr at this temperature. What is the mass of the sample of gas which was collected
what is the reduced mass of benzene. THe atomic masses of C and H are 12.00 and 1, respectively.
A fossil was analyzed and determined to have a carbon-14 level that is 62.0 that of living organisms. How old is the fossil
Write structural formulas for all of the possible isomers of -pentyne that can be formed by moving the position of the triple bond
What is the normality of a solution prepared from 10 ml 0.6 N nitric acid by diluting it to 60 ml
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