ACS Gen Chem Practice Test 9

10 free ACS Gen Chem practice questions in the real exam format, covering the official content areas, with an explanation for every answer.

ACS Gen Chem Practice Test 9Tutor mode

Question 1 of 10

Atoms

Iodine-131 has a half-life of 8.02 days. What mass of I-131 remains from a 20.0 mg sample after 40.1 days?