This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: What percentage of a radioactive substance remains after 6.00 half-lives have elapsed? (Read 154 times)

joe

  • Hero Member
  • *****
  • Posts: 627
on: Feb 15, 2020

Question 1

Neptunium-239 has a half-life of 2.35 days. How many days must elapse for a sample of 239Np to decay to 3.00% of its original quantity?
◦ 0.0841 days
◦ 1.03 days
◦ 0.967 days
◦ 11.9 days

Question 2

What percentage of a radioactive substance remains after 6.00 half-lives have elapsed?
◦ 0.781%
◦ 3.12%
◦ 6.25%
◦ 1.56%
Chemistry ¦ McMurry, Fay, Robinson ¦ 7th Edition
Buy Test-Bank


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by joe on Feb 15, 2020

lorealeza77

  • Sr. Member
  • ****
  • Posts: 356
Reply #1 on: Feb 15, 2020
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 39% of students answer this correctly


joe

  • Member
  • Posts: 627
Reply 2 on: Feb 15, 2020
:D TYSM

rleezy04

  • Member
  • Posts: 322
Reply 3 on: Yesterday
Excellent

« previous next »
 

Did you know?

The largest baby ever born weighed more than 23 pounds but died just 11 hours after his birth in 1879. The largest surviving baby was born in October 2009 in Sumatra, Indonesia, and weighed an astounding 19.2 pounds at birth.

Did you know?

Acute bronchitis is an inflammation of the breathing tubes (bronchi), which causes increased mucus production and other changes. It is usually caused by bacteria or viruses, can be serious in people who have pulmonary or cardiac diseases, and can lead to pneumonia.

Did you know?

A headache when you wake up in the morning is indicative of sinusitis. Other symptoms of sinusitis can include fever, weakness, tiredness, a cough that may be more severe at night, and a runny nose or nasal congestion.

Did you know?

In 1835 it was discovered that a disease of silkworms known as muscardine could be transferred from one silkworm to another, and was caused by a fungus.

Did you know?

Nitroglycerin is used to alleviate various heart-related conditions, and it is also the chief component of dynamite (but mixed in a solid clay base to stabilize it).

(a) The relative age ranges of different dating techniques depend upon the half-life of the system u (a) The relative age ranges of different dating techniques depend upon the half-life of the system u
The Warm Mineral Springs individuals from Florida may be among the earliest Paleo-Indian skeletal re The Warm Mineral Springs individuals from Florida may be among the earliest Paleo-Indian skeletal re
(A) A brisk half-moon stroke is an efficient technique to use with the body brush or exfoliation ... (A) A brisk half-moon stroke is an efficient technique to use with the body brush or exfoliation ...
Percentage of Americans Living in Communities with a Fluoridated Water Supply, by State. 2012 Percentage of Americans Living in Communities with a Fluoridated Water Supply, by State. 2012
Investment in Computers as a Percentage of GDP, 1982–2009 Investment in Computers as a Percentage of GDP, 1982–2009
Carbon-11 is used in medical imaging. The half-life of this radioisotope is 20.4 min. What ... Carbon-11 is used in medical imaging. The half-life of this radioisotope is 20.4 min. What ...
Video: Hierarchical Sequencing Method - Sequence Tagged Sites

For a complete list of videos, visit our video library