Carbon-14 has a half-life of 5730 years. If you start with a 2.37 g sample, how much would remain after 17,190 years?

5,730 years; The graph shows that 50 percent of the carbon-14 atoms have decayed after 5,730 years, so 5,730 is the half-life of carbon-14.

Explanation:

c. heat could easily travel through the molecules in the air and escape/enter the flask. removing the air slows down the heat transfer.  

1. they vary with a higher number because boiling is way hotter than melting