......
2.0 g
8.0 g
16.0 g
32.0 g
-
m * (1/2)^4 = 2.0 g
m = (2.0 g) * 2^4
q
keywords: have,with,lives,you,How,start,did,half,substance,much,of,left,2.0,four,After,radioactive,material,After four half-lives of a radioactive substance, you have 2.0 g left. How much material did you start with
