The half life for the radioactive decay of potassium- to argon- is years.
suppose nuclear chemical analysis shows that there is of argon- for every of potassium- in a certain sample of rock. calculate the age of the rock.
round your answer to significant digits.

The equation below shows a chemical reaction. a + b + heat —> c + d according to the law of conservation of energy, which statement is true? a. the reactants absorb heat because they have less energy than the products. b. the products release heat because they have more energy than the reactants. c. the reactants generate heat because they have more energy than the products. d. the products require heat to form because they have less energy than the reactants.