6. Positive uses of radioactive decay used by humans would not include a. Cancer treatment.
b. Killing microbes.
c. Carbon dating artifacts.
d. All of the above are actually positive.

Which of the following is most likely true about water in chemical solutions?

Given the following at 25c calculate delta hf for hcn (g) at 25c. 2nh3 (g) +3o2 (g) + 2ch4 (g) > 2hcn (g) + 6h2o (g) delta h rxn= -870.8 kj. delta hf=-80.3 kj/mol for nh3 (g), -74.6 kj/mol for ch4, and -241.8 kj/mol for h2o (g)

Condensation happens when water vapor cools. true or false? ?