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.

At stp, what is the volume of 1 mole of co2?

Aglow stick contains a glass vial with chemicals. when the glow stick is bent, the vial breaks and the chemicals react to produce a glow. a science student observes that a glow stick kept in the freezer glows for a longer duration than a glow stick kept at room temperature. what conclusion can be drawn based on the observation? be sure to note the outcome and test variables in the conclusion.

Which is an example of the practical pursuit of alchemy? a. forming perfect substances. b. transforming base metals. c. developing metalworking techniques. d. linking spiritual characteristics with material substances.