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

Author Question: The half-life of cobalt-60 is 5.20 y. How many milligrams of a 6.000-mg sample remain after 10.5 years? (Read 148 times)

NguyenJ

  • Hero Member
  • *****
  • Posts: 516
on: Nov 18, 2019

Question 1

What percentage of a radioactive substance remains after 7.00 half-lives have elapsed?
◦ 1.56%
◦ 0.78%
◦ 3.12%
◦ 0.391%

Question 2

The half-life of cobalt-60 is 5.20 y. How many milligrams of a 6.000-mg sample remain after 10.5 years?
◦ 24.3 mg
◦ 0.0543 mg
◦ 1.48 mg
◦ 5.75 mg
◦ 0.123 mg
Chemistry: A Molecular Approach (Canadian) ¦ Tro, Fridgen, Shaw ¦ 2nd Edition
Buy Test-Bank


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by NguyenJ on Nov 18, 2019

asdfasdf

  • Sr. Member
  • ****
  • Posts: 339
Reply #1 on: Nov 18, 2019
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 29% of students answer this correctly


NguyenJ

  • Member
  • Posts: 516
Reply 2 on: Nov 18, 2019
Gracias!

tanna.moeller

  • Member
  • Posts: 328
Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

« previous next »
 

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?

Women are 50% to 75% more likely than men to experience an adverse drug reaction.

Did you know?

It is important to read food labels and choose foods with low cholesterol and saturated trans fat. You should limit saturated fat to no higher than 6% of daily calories.

Did you know?

A good example of polar molecules can be understood when trying to make a cake. If water and oil are required, they will not mix together. If you put them into a measuring cup, the oil will rise to the top while the water remains on the bottom.

Did you know?

Tobacco depletes the body of vitamins A, C, and E, which can result in any of the following: dry hair, dry skin, dry eyes, poor growth, night blindness, abscesses, insomnia, fatigue, reproductive system problems, sinusitis, pneumonia, frequent respiratory problems, skin disorders, weight loss, rickets, osteomalacia, nervousness, muscle spasms, leg cramps, extremity numbness, bone malformations, decayed teeth, difficulty in walking, irritability, restlessness, profuse sweating, increased uric acid (gout), joint damage, damaged red blood cells, destruction of nerves, infertility, miscarriage, and many types of cancer.

In 2008, the U.S. economy suffered a gaping wound as several trillion dollars were ripped out of it. In 2008, the U.S. economy suffered a gaping wound as several trillion dollars were ripped out of it.
In old age, as in all other stages of the life course, people find life more pleasant if they have ... In old age, as in all other stages of the life course, people find life more pleasant if they have ...
The human eye, a product of 600 million years of evolution (Lamb, Collin, & Pugh, 2007). The human eye, a product of 600 million years of evolution (Lamb, Collin, & Pugh, 2007).
The permissible exposure limit (PEL) and immediately dangerous to life and health (IDLH) ... The permissible exposure limit (PEL) and immediately dangerous to life and health (IDLH) ...
Pizza and eating disorders can be life threatening Pizza and eating disorders can be life threatening
Life cycle of a Plasmodium species that causes malaria Life cycle of a Plasmodium species that causes malaria
Video: Causes of Acne

For a complete list of videos, visit our video library