The observed first-order rate of decay of carbon-14 in living material is 13.6 counts per minute per gram of carbon. An old wooden cup was discovered and found to give 10.9 counts per minute per gram of carbon. If the half-life of C-14 is 5730 years, approximately how old is the cup

If 1.63 times 10 negative 4 of helium dissolves in 100.0g of water, what is the concentration in parts per million

Which of the following observations indicates that there is a small, dense, positively charged part in the center of an atom? some uncharged particles are scattered by a gold foil. all uncharged particles are attracted towards a gold foil. all positively charged particles pass straight through a gold foil. some positively charged particles bounce back from a gold foil.

Which element would mostly likely have an electron affinity measuring closest to zero