Question

A 2 g sample of a substance has half-life of 30 min. Mass of this substance decayed in 3 hrs

А

2.52g

B

1.97 g

C

0.62 g

D

0.15 g​

Answer 1

Explanation:

dont now ..... byyyyyyyyyy

Answer 2

Answer:

12 g

Explanation:

You please re-check your options. Also see the solved attachement