1. The remains of a pre-historic human are found. The mass of carbon in the sample...
Mass of carbon in animal bone fragment found in an archeological site is 198g. If the bone registers an activity of 16 decays/s from radioactive 14C. What is its age?. Assume that the animal when it died that the ratio of 14C to 12C was 1.3x10-12. The half-life of 14C is 5730years.
An archaeologist finds some ancient jewelry made from bone. The jewelry has a carbon mass of 303 g (HINT: Assume all the carbon is 12C and determine the number of atoms) and careful measurements show that the remaining 14C has a current decay rate of 14 decays/s. Determine the age of the bone (and presumably the jewelry). Remember, the ratio of 14C to 12C when the animal died was 1.3×10-12 & the half-life of 14C is 5730 y. age of...
An ancient club is found that contains 140 g of pure carbon and has an activity of 5.5 decays per second. Determine its age assuming that in living trees the ratio of (14c 12c) atoms is about . Note that the half life of carbon-14 is 5700 years and the Avogadro number is 6.02x10^23. in years
An ancient club is found that contains 190 g of pure carbon and has an activity of 6.5 decays per second. Determine its age assuming that in living trees the ratio of (14C / 12C) atoms is about 1.20×10-12. Note that the half life of carbon-14 is 5700 years and the Avogadro number is 6.02×1023. Answer in years.
An ancient wooden club is found that contains 79 g of carbon and has an activity of 7.0 decays per second. Determine its age assuming that in living trees the ratio of 14C/12C atoms is about 1.3×10−12.
An ancient wooden club is found that contains 66 g of carbon and has an activity of 7.5 decays per second. Determine its age assuming that in living trees the ratio of 14C/12C atoms is about 1.3×10−12. Please show your work.
The mass percent of carbon in a typical human is 18%, and the mass percent of 14c in natural carbon is 1.6 × 10-10%. Assuming a 185-lb person, how many decay events per second occur in this person due exclusively to the B-particle decay of 14c? For 14c, t1/2 = 5730 years Rate = beta particles/s
The mass percent of carbon in a typical human is 18%, and the mass percent of : 14c in natural carbon is 1.6 10-10%. Assuming a 165-lb person, how many decay events per second occur in this person due exclusively to the B-particle decay of 14c? For 14c, t1/2 = 5730 years Rate = beta particles/s Submit Answer Try Another Version 7 item attempts remaining
An ancient wooden club is found that contains 87 g of carbon and has an activity of 7.0 decays per second. Determine its age assuming that in living trees the ratio of 14C/12C atoms is about 1.3×10−12 csn you please explain every step, thank you
Radiocarbon or 14C is a widely used tracer for groundwater movement for up to 30,000 years. 14C can be used to estimate recharge rates and horizontal flow rates important for water related policy decisions. 14C has a half-life of 5730 years and the ratio of 14C to all C from biological material is 1.3 × 10−12. The atomic mass of carbon is 12.0107 g/mol. Your sample is 0.29 g of carbon. The activity of this sample, due to presence of...