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

Author Question: A second-order reaction has a half-life of 18 s when the initial concentration of reactant is 0.71 ... (Read 160 times)

KimWrice

  • Hero Member
  • *****
  • Posts: 579
on: Aug 27, 2018
A second-order reaction has a half-life of 18 s when the initial concentration of reactant is 0.71 M. The rate constant for this reaction is ________ M-1s-1.
 
  A) 7.8  10-2
  B) 3.8  10-2
  C) 2.0  10-2
  D) 1.3
  E) 18

Question 2

Why does fluoride treatment render teeth more resistant to decay?
 
  A) Fluoride kills the bacteria in the mouth that make the acids that decay teeth.
  B) Fluoride stimulates production of tooth enamel to replace that lost to decay.
  C) Fluoride reduces saliva production, keeping teeth drier and thus reducing decay.
  D) Fluoride converts hydroxyapatite to fluoroapatite that is less reactive with acids.
  E) Fluoride dissolves plaque, reducing its decaying contact with teeth.
Chemistry: The Central Science ¦ Brown, LeMay, Bursten ¦ 14th Edition
Buy Test-Bank


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Ahernandez18

  • Sr. Member
  • ****
  • Posts: 361
Reply #1 on: Aug 27, 2018
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 25% of students answer this correctly


KimWrice

  • Hero Member
  • *****
  • Posts: 579
Reply #2 on: Aug 27, 2018
Thank you!


Ahernandez18

  • Sr. Member
  • ****
  • Posts: 361
Reply #3 on: Aug 27, 2018
Always glad to help...


« previous next »
 

Did you know?

About 600,000 particles of skin are shed every hour by each human. If you live to age 70 years, you have shed 105 pounds of dead skin.

Did you know?

Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.

Did you know?

Alzheimer's disease affects only about 10% of people older than 65 years of age. Most forms of decreased mental function and dementia are caused by disuse (letting the mind get lazy).

Did you know?

Nitroglycerin is used to alleviate various heart-related conditions, and it is also the chief component of dynamite (but mixed in a solid clay base to stabilize it).

Did you know?

Certain topical medications such as clotrimazole and betamethasone are not approved for use in children younger than 12 years of age. They must be used very cautiously, as directed by a doctor, to treat any child. Children have a much greater response to topical steroid medications.

Sporic life cycles Sporic life cycles
The Scale of Life The Scale of Life
How to setup and solve a half-life problem using a table of values (Question 1) How to setup and solve a half-life problem using a table of values (Question 1)
Next Series: Digital Life Next Series: Digital Life
Psychology and Life Psychology and Life
Life cycle of Obelia, a hydrazoan that has alternating medusa (left) and polyp generations Life cycle of Obelia, a hydrazoan that has alternating medusa (left) and polyp generations
Video: Krebs cycle : Formation of acetyl coenzyme A and Electron transport chain

For a complete list of videos, visit our video library