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If a layer of peat beneath the glacial sediments of the last ice age has a carbon-14/carbon-12 ratio that is 23.6% of that found in living organisms. Explain how long ago was this ice age?
what mass of magnesium will react wait a 500.0mL container of oxygen at 150.0 degrees Celsius at 70.0 kPa?
Find the lowest temperature of vaporization and the highest temperature when there is liquid left over and Determine the range of temperatures which could be used for this process.
calculate the initial reaction rate when [O3] & [NO] remain essentially constant at the values [O3]0= 7.48 x 10-6 M & [NO]0= 3.26 x 10-5M
The flue gases leave the heater at 410 F. Of the entering methane, 70% burns to carbon dioxide and 30% burns to carbon monoxide. What volumetric flow rate of fuel gas is required if there are no heat losses to the surroundings?
In the following amino acid sequences, what amino acids will interact if the peptide forms an alpha-helix? Do you expect this structure to be stable? Why or why not?
The unit cell for tin has tetragonal symmetry, with a and b lattice parameters of 0.583 and 0.318 nm, respectively. If its density, atomic weight, and atomic radius are 7.30 g/cm3, 118.69 g/mol, and 0.151 nm, respectively, compute the atomic packi..
Copper (II) fluoride contains 37.42% F by mass. Use this percentage to compute the mass of fluorine in grams contained in 28.5 g of copper (II) fluoride
The main reason that alkyl halies are good electrophiles is that: A) the carbon atom linked to the halogen is negatively polarized. B) the carbon atom linked to the halogen is positively polarized
Treatment of cyclohexanone in the presence of sodium borohydride results in a product that can be isolated and purified using distillation. The IR spectrum of this product is shows a very broad peak at 3331cm-1, peaks to right of 3000cm-1
What is the molality of the 45.0 mass % ethylene glycol (C2H6O2) solution in the water
calculate the pH and concentration of all species present assuming that the activity coefficients are equal to 1.0 for all species
When a 6.00-g sample of RbBr is dissolved in water in a calorimeter that has a total heat capacity of 1.806 kJ·K-1, the temperature decreases by 0.440 K. Calculate the molar heat of solution of RbBr.
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