Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
All living things contain carbon. Most of this carbon is stable carbon-12. However, a small percentage will be carbon-14, a radioactive isotope of carbon that decays with time. As living things eat and breath, carbon is constantly recycled and therefore the percentage of carbon-14 remains constant. It's not until death that the percentage of carbon-14 will begin to diminish from decay. Because radioactive decay is a first-order process, the integrated rate law for a first-order reaction can be rewritten as
fraction remaining = 0.5 ^(t/t1/2)
where is the time elapsed and is the half-life. The half-life of C-14 is 5730 years.
A fossil was analyzed and determined to have a carbon-14 level that is 72.0% that of living organisms. How old is the fossil? Express your answer numerically in years.
what is the minimum distribution coefficient that permits the removal of 99% of a solute from 50 mL of water with a. two 25mL extrations with toluluene
How many moles of CO2 will be produced if 3.119 g of O2 are reacted completely?
A piece of metal of mass 27 g at 105?C is placed in a calorimeter containing 49.2 g of water at 19?C. The ?nal temperature of the mixture is 30?C. What is the speci?c heat capacity of the metal.
12.0 moles of gas are in a 5.00 L tank at 23.9 C. Calculate the difference in pressure between methane and an ideal gas under these conditions.
Consider equimolar samples of different ideal gases at the same volume and temperature. Gas A has a higher molar mass than gas B.
What kinetic energy must the electrons have in order to resolve a protein molecule that is 5.10 nm in diameter? Take the mass of an electron to be 9.11× 10-31 kg.
given 4 NH3(g) + 5 O2(g)4 NO(g) + 6 H2O(g) 1,25g of NH3 reacts with 2,29g of O2 what is the limiting reactant?
Assuming that no heat is lost to the cup or the surroundings, what will the final temperature of the water be? The specific heat capacity of iron = 0.449 J/g°C and water = 4.18 J/g°C.
0.158g of a barium halide is completely precipitated out of H2SO4 and 0.124g of barium sulfate are produced. what is the true formula of the compound.
A student performs an extraction using water and methylene chloride. Which is the top layer and which is
Write a net ionic equation to explain why the pH didn't go up to about 10, as it would have if that amount of NaOH were added to distilled water or to 20ml 0.00040 M HCL, which also would have a pH of 3.40
Henry's constant for CO in water at 25 degrees Celsius is 9.71 x 10^-4 mol/L atom. How many grams of CO will dissolve in 1.00 L of water at a CO partial pressure of 2.75 atm
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd