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

Author Question: Radium occurs only in uranium ores, typically with an observed Ra/U ratio of 1mg/3kg. Uranium ores ... (Read 119 times)

audragclark

  • Hero Member
  • *****
  • Posts: 579
on: Feb 15, 2020

Question 1

If the age of the Earth is 4.5 billion years and the half-life of 40K is 1.26 billion years, what percent of the Earth's original amount of 40K remains today?
◦ 16%
◦ 4.2%
◦ 8.4%
◦ 12%

Question 2

Radium occurs only in uranium ores, typically with an observed Ra/U ratio of 1mg/3kg. Uranium ores normally contain only about 200 ppm of U. How many kilograms of uranium ore must be processed to obtain 1 mg of radium?
◦ 6.0 × 108 kg ore
◦ 15,000 kg ore
◦ 1700 kg ore
◦ None of these
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 audragclark on Feb 15, 2020

jessicaduplan

  • Sr. Member
  • ****
  • Posts: 337
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 49% of students answer this correctly


audragclark

  • Member
  • Posts: 579
Reply 2 on: Feb 15, 2020
Thanks for the timely response, appreciate it

Liamb2179

  • Member
  • Posts: 365
Reply 3 on: Yesterday
Wow, this really help

« previous next »
 

Did you know?

The familiar sounds of your heart are made by the heart's valves as they open and close.

Did you know?

All patients with hyperparathyroidism will develop osteoporosis. The parathyroid glands maintain blood calcium within the normal range. All patients with this disease will continue to lose calcium from their bones every day, and there is no way to prevent the development of osteoporosis as a result.

Did you know?

Though Candida and Aspergillus species are the most common fungal pathogens causing invasive fungal disease in the immunocompromised, infections due to previously uncommon hyaline and dematiaceous filamentous fungi are occurring more often today. Rare fungal infections, once accurately diagnosed, may require surgical debridement, immunotherapy, and newer antifungals used singly or in combination with older antifungals, on a case-by-case basis.

Did you know?

Children of people with alcoholism are more inclined to drink alcohol or use hard drugs. In fact, they are 400 times more likely to use hard drugs than those who do not have a family history of alcohol addiction.

Did you know?

Women are two-thirds more likely than men to develop irritable bowel syndrome. This may be attributable to hormonal changes related to their menstrual cycles.

Cataract. When the pupil is dilated, an abnormal opacity or whiteness of the lens can be observed in Cataract. When the pupil is dilated, an abnormal opacity or whiteness of the lens can be observed in
Breast cancer. Notice the tumor growing within a lactiferous gland, which occurs in infiltrating duc Breast cancer. Notice the tumor growing within a lactiferous gland, which occurs in infiltrating duc
Breast cancer. Notice the tumor growing within a lactiferous gland, which occurs in infiltrating duc Breast cancer. Notice the tumor growing within a lactiferous gland, which occurs in infiltrating duc
Darwin observed that tortoises on islands that are arid tend to have saddle-shaped shells, allowing Darwin observed that tortoises on islands that are arid tend to have saddle-shaped shells, allowing
Observed Mother–Child Arguments at Five Time Points Over an Eight-Year Period Observed Mother–Child Arguments at Five Time Points Over an Eight-Year Period
Observed change in surface temperature from 1901 to 2012 Observed change in surface temperature from 1901 to 2012
Video: Depolarization of the SA node, Action potentials of the myocardium & ANS effects

For a complete list of videos, visit our video library