This topic contains a solution. Click here to go to the answer

Author Question: Sodium-24 has a half-life of 15 h. How many hours is three half-lives? (Read 39 times)

roselinechinyere27m

  • Hero Member
  • *****
  • Posts: 557

Question 1

The half-life of bromine-74 is 25 min. How much of a 4.0 mg sample is still active after 75 min?
◦ 1.0 mg
◦ 0.25 mg
◦ 2.0 mg
◦ 4.0 mg
◦ 0.50 mg

Question 2

Sodium-24 has a half-life of 15 h. How many hours is three half-lives?
◦ 7.5 h
◦ 30 h
◦ 60 h
◦ 15 h
◦ 45 h


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by roselinechinyere27m on Jun 7, 2021

honnalora

  • Sr. Member
  • ****
  • Posts: 325
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
Answer Preview
Only 50% of students answer this correctly




roselinechinyere27m

  • Member
  • Posts: 557
Reply 2 on: Jun 7, 2021
YES! Correct, THANKS for helping me on my review


Missbam101

  • Member
  • Posts: 341
Reply 3 on: Yesterday
Excellent

 

Did you know?

Approximately one in three babies in the United States is now delivered by cesarean section. The number of cesarean sections in the United States has risen 46% since 1996.

Did you know?

Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.

Did you know?

This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.

Did you know?

The word drug comes from the Dutch word droog (meaning "dry"). For centuries, most drugs came from dried plants, hence the name.

Did you know?

The top five reasons that children stay home from school are as follows: colds, stomach flu (gastroenteritis), ear infection (otitis media), pink eye (conjunctivitis), and sore throat.

For a complete list of videos, visit our video library