« previous next »

Author Question: A rock contains 0.153 mg of lead-206 for each milligram of uranium-238. The half-life for the decay ... (Read 165 times)

itsmyluck

  • Hero Member
  • *****
  • Posts: 546
on: Aug 27, 2018
A rock contains 0.153 mg of lead-206 for each milligram of uranium-238. The half-life for the decay of uranium-238 to lead-206 is 4.5  109 yr. The rock was formed ________ years ago.
 
  A) 6.89  108
  B) 5.60  108
  C) 7.33  108
  D) 1.06  109
  E) 8.08  108

Question 2

The concentration of sodium sulfate solution is 18.6 by mass. There are ________ g of sodium sulfate present in a 236.5 g sample of this solution.
 
  A) 44.0
  B) 4400
  C) 0.000786
  D) 7.86
  E) 1270
Chemistry: The Central Science ¦ Brown, LeMay, Bursten ¦ 14th Edition
Buy Test-Bank


TheDev123

  • Sr. Member
  • ****
  • Posts: 332
Reply #1 on: Aug 27, 2018
Answer to Question 1

D

Answer to Question 2

A


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

itsmyluck

  • Hero Member
  • *****
  • Posts: 546
Reply #2 on: Aug 27, 2018
Both answers were spot on, thank you once again


TheDev123

  • Sr. Member
  • ****
  • Posts: 332
Reply #3 on: Aug 27, 2018
Great! Please up vote :D


« previous next »
 

Did you know?

After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.

Did you know?

More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.

Did you know?

Fatal fungal infections may be able to resist newer antifungal drugs. Globally, fungal infections are often fatal due to the lack of access to multiple antifungals, which may be required to be utilized in combination. Single antifungals may not be enough to stop a fungal infection from causing the death of a patient.

Did you know?

Stevens-Johnson syndrome and Toxic Epidermal Necrolysis syndrome are life-threatening reactions that can result in death. Complications include permanent blindness, dry-eye syndrome, lung damage, photophobia, asthma, chronic obstructive pulmonary disease, permanent loss of nail beds, scarring of mucous membranes, arthritis, and chronic fatigue syndrome. Many patients' pores scar shut, causing them to retain heat.

Did you know?

Opium has influenced much of the world's most popular literature. The following authors were all opium users, of varying degrees: Lewis Carroll, Charles, Dickens, Arthur Conan Doyle, and Oscar Wilde.

Layers of Rock Laid Down by Water Layers of Rock Laid Down by Water
Fossils are formed after an animal dies, decomposes, and is covered in sediment. Minerals in ground Fossils are formed after an animal dies, decomposes, and is covered in sediment. Minerals in ground
In Situ Uranium Leaching In Situ Uranium Leaching
RAINBOW SERPENT ROCK RAINBOW SERPENT ROCK
Life in sulfur-rich, anoxic sediments Life in sulfur-rich, anoxic sediments
Video: Glomerular filtrate rate: pressures that affect GFR, NFP & GFR and blood composition

For a complete list of videos, visit our video library