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

Author Question: The half-life of 222Rn is 3.80 days. If a sample contains 36.0 g of Rn-222, how many years will it ... (Read 153 times)

kaid0807

  • Hero Member
  • *****
  • Posts: 515
on: Aug 27, 2018
The half-life of 222Rn is 3.80 days. If a sample contains 36.0 g of Rn-222, how many years will it take for the sample to be reduced to 1.00 mg of Rn-222?
 
  A) 19.7
  B) 0.1597
  C) 8.53
  D) 0.0234
  E) none of the above

Question 2

What is the concentration (M) of 39.88 mL of an unknown NaOH solution if it required 46.08 mL of 0.6592 M HCl to neutralize?
 
  A) 0.7617
  B) 2788
  C) 1211
  D) 1.313
  E) 1.211


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

spencer.martell

  • Sr. Member
  • ****
  • Posts: 342
Reply #1 on: Aug 27, 2018
Answer to Question 1

B

Answer to Question 2

A


kaid0807

  • Member
  • Posts: 515
Reply 2 on: Aug 27, 2018
Gracias!

chereeb

  • Member
  • Posts: 326
Reply 3 on: Yesterday
:D TYSM

« previous next »
 

Did you know?

Asthma is the most common chronic childhood disease in the world. Most children who develop asthma have symptoms before they are 5 years old.

Did you know?

There are 60,000 miles of blood vessels in every adult human.

Did you know?

A cataract is a clouding of the eyes' natural lens. As we age, some clouding of the lens may occur. The first sign of a cataract is usually blurry vision. Although glasses and other visual aids may at first help a person with cataracts, surgery may become inevitable. Cataract surgery is very successful in restoring vision, and it is the most frequently performed surgery in the United States.

Did you know?

It is difficult to obtain enough calcium without consuming milk or other dairy foods.

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.

Laminaria Life Cycle Laminaria Life Cycle
Sample Student Externship Form Sample Student Externship Form
Life cycle of Ascaris: Adult worms (1) live in the lumen of the small intestine. A female may ... Life cycle of Ascaris: Adult worms (1) live in the lumen of the small intestine. A female may ...
An oral contraceptive showing the daily doses and the different formulation taken in the last 7 days ... An oral contraceptive showing the daily doses and the different formulation taken in the last 7 days ...
The energy cycle of life The energy cycle of life
Life cycle of bacteriophage T4 Life cycle of bacteriophage T4
Video: Mendel's Principles of Inheritance (Father of Genetics)

For a complete list of videos, visit our video library