Match the radioactive tracer with its most common use.

1. Estimating the age of formerly living ancient artifacts
2. Biological tracer used in PET scans
3. Cancer treatments
4. Most widely used biological tracer used to detect brain tumors and bone and 5. lung ailments
6. Detection and treatment of thyroid ailments
7. Fuel in nuclear reactors
8. Smoke detectors in homes and industry

A. Iodine-131
B. Uranium-235
C. Cobalt-60
D. Carbon-14
E. Technitium-99
F. Fluorine-18
G. Americium-241

Steam reforming of methane ( ch4) produces "synthesis gas," a mixture of carbon monoxide gas and hydrogen gas, which is the starting point for many important industrial chemical syntheses. an industrial chemist studying this reaction fills a 1.5 l flask with 3.5 atm of methane gas and 1.3 atm of water vapor at 43.0°c. he then raises the temperature, and when the mixture has come to equilibrium measures the partial pressure of carbon monoxide gas to be 1 .0 atm. calculate the pressure equilibrium constant for the steam reforming of methane at the final temperature of the mixture. round your answer to 2 significant digits.