Environmental Chemistry Assignment | Professional Essay Writers
February 20th, 2020
1. How long will it take for 15% of the U−238 atoms in a sample of U−238 to decay?
Express your answer using two significant figures.
2. If a sample of U−238 initially contained 1.7×1018 atoms when the universe was formed 13.8 billion years ago, how many U−238 atoms will it contain today?
Express your answer using two significant figures. Get Chemistry help Today