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 116 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
YES! Correct, THANKS for helping me on my review

sultansheikh

  • Member
  • Posts: 335
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

The lipid bilayer is made of phospholipids. They are arranged in a double layer because one of their ends is attracted to water while the other is repelled by water.

Did you know?

The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.

Did you know?

When intravenous medications are involved in adverse drug events, their harmful effects may occur more rapidly, and be more severe than errors with oral medications. This is due to the direct administration into the bloodstream.

Did you know?

In 2012, nearly 24 milliion Americans, aged 12 and older, had abused an illicit drug, according to the National Institute on Drug Abuse (NIDA).

Did you know?

Drug abusers experience the following scenario: The pleasure given by their drug (or drugs) of choice is so strong that it is difficult to eradicate even after years of staying away from the substances involved. Certain triggers may cause a drug abuser to relapse. Research shows that long-term drug abuse results in significant changes in brain function that persist long after an individual stops using drugs. It is most important to realize that the same is true of not just illegal substances but alcohol and tobacco as well.

Mendel's breeding program that produced a 9 : 3 : 3 : 1 ratio Mendel's breeding program that produced a 9 : 3 : 3 : 1 ratio
(A) Bronchopneumonia with localized pattern. (B) Lobar pneumonia with a diffuse pattern within the l (A) Bronchopneumonia with localized pattern. (B) Lobar pneumonia with a diffuse pattern within the l
Young children typically are boundlessly curious about the world around them. Young children typically are boundlessly curious about the world around them.
GDP per Capita in the United States, 1870–2009 (Ratio Scale) GDP per Capita in the United States, 1870–2009 (Ratio Scale)
Immune-to-brain signaling occurs in response to infection, injury, and inflammation that occur in pe Immune-to-brain signaling occurs in response to infection, injury, and inflammation that occur in pe
Video: Lactation and Breast Feeding

For a complete list of videos, visit our video library