Bismuth-212 has a half-life of 60.5 minutes. If you start with 128 grams of Bi-212, how much unchanged Bismuth-212 will be left after 7 half-lives?
(include units with your answer *

Asolution is made by dissolving 25.5 grams of glucose (c6h12o6) in 398 grams of water. what is the freezing point depression of the solvent if the freezing point constant is -1.86 °c/m? show all of the work needed to solve this problem.

Which of these statements explains the difference between nuclear binding energy and the strong nuclear force ?

The twister and runaway train are two coasters at the same amusement park. both coasters start at the same height. the coaster for the twister is twice the mass of the coaster for the runaway train. which roller coaster has greater gravitational potential energy at the start of the ride?