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A) In a living organism, the decay of C-14 produces 15.3 disintegrations per minute per gram of carbon. The half-life of C-14 is 5730 years. A bone sample with 4.0 g of carbon has 17.5 disintegrations per minute. How old is the bone sample in years?
B) What percentage of the atoms of carbon in the biosphere are C-14?
When doing column chromatography using a silica as a solvent. got two bands when separating blue dextran...but unfortunately cannot remember the colors of those bands
A cell composed of a platinum indicator electrode and a silver-silver chloride reference electrode in a solution containing both Fe2 and Fe3 has a cell voltage of 0.718 V. If the silver-silver chloride electrode is replaced with a saturated calome..
Question- Sodium azide decomposes very rapidly to produce nitrogen gas in car airbags. The reaction is 2NaN3(s)-----> 2Na(s)+3N2(g). What mass of sodium azide will inflate a 60.0L airbag to a pressure of 1.5atm at 32degreesC
A mass suspended on a spring is pulled down and released. It oscillates up and down as illustrated in Fig. 4.23. Assuming the total energy to be conserved, use the letter designations to identify the spring's position(s) as listed in Question 15. ..
Water is about 15% denser than oil, What implications does this difference have on: An oil-based fire hazard such as burning oil slick, and cleaning up an oil spill.
calculate the work done by the gas in each case. For He, Cp= 20.79 J/K/mol and Cv= 12.38 J/K/mol, which may be taken as independent of temperature.
A carbon-carbon single bond has a bond energy of approximately 348kJ/mole
write concerning the fe 3 ion in aqueous solution so that will be able to visualize based on what you have written what
Calculate the molar solubility of AgBr in a 1.00 M aqueous solution of ammonia. Then calculate the solubility of AgBr in pure water, and compare the two solubilities. (Ksp for silver bromide is 7.7x10^-13 and Kf for Ag(NH3)2+ is 1.6x10^7)
If all the energy obtained from burning 1.26 pounds of ethane (fuel value is 11.36 kcal/g) is used to heat 123.0 kg of water at an initial temperature of 22.0 °C, what is the final temperature
A current of 5.63 A is passed through a Sn(NO3)2 solution. How long (in hours) would this current have to be applied to plate out 8.20 g of tin
The standard reaction enthalpy for the decomposition of CaCl2_NH3 into CaCl2 and NH3 is nearly constant at +78 kJ/mol between 350 K and 470 K.
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