18. A radioactive element has a half-life of 18,000 years. There was 400 grams of the element originally. There is now 12.5 grams of the radioactive element left. What is the age of the
sample?

The rules of engagement (roe) working group is often used to (select all that apply.)

Why are people not able to skip a dive to the deepest part of the ocean

16. in a reaction that has reached equilibrium, a. the forward and reverse reactions are occurring at the same rate. b. the reactants and products are in equal concentrations. c. the forward reaction has gone further than the reverse reaction. d. there are equal numbers of atoms on both sides of the equation. e. a, b, and d are correct.