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

Author Question: Approximately how many elements occur naturally on Earth? A) 20 B) 60 C) 90 D) ... (Read 165 times)

waynest

  • Hero Member
  • *****
  • Posts: 553
on: Aug 27, 2018
Approximately how many elements occur naturally on Earth?
 
  A) 20
  B) 60
  C) 90
  D) 115

Question 2

What is the mass in grams of 1.000 mole of P2O5?
 
  A) 239.03 g
  B) 61.96 g
  C) 142.0 g
  D) 46.98 g


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Li Jun

  • Sr. Member
  • ****
  • Posts: 335
Reply #1 on: Aug 27, 2018
Answer to Question 1

C

Answer to Question 2

C


waynest

  • Hero Member
  • *****
  • Posts: 553
Reply #2 on: Aug 27, 2018
TY


Li Jun

  • Sr. Member
  • ****
  • Posts: 335
Reply #3 on: Aug 27, 2018
You're welcome


« previous next »
 

Did you know?

Astigmatism is the most common vision problem. It may accompany nearsightedness or farsightedness. It is usually caused by an irregularly shaped cornea, but sometimes it is the result of an irregularly shaped lens. Either type can be corrected by eyeglasses, contact lenses, or refractive surgery.

Did you know?

There are more nerve cells in one human brain than there are stars in the Milky Way.

Did you know?

In 2006, a generic antinausea drug named ondansetron was approved. It is used to stop nausea and vomiting associated with surgery, chemotherapy, and radiation therapy.

Did you know?

Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.

Did you know?

Many supplement containers do not even contain what their labels say. There are many documented reports of products containing much less, or more, that what is listed on their labels. They may also contain undisclosed prescription drugs and even contaminants.

Changes in Earth's atmospheric carbon dioxide levels over geological time. Changes in Earth's atmospheric carbon dioxide levels over geological time.
Life on Earth Life on Earth
The nurse needs to inform the patient with impaired vision when a touch is to occur and ask permissi The nurse needs to inform the patient with impaired vision when a touch is to occur and ask permissi
Rivers on Mars and Earth Rivers on Mars and Earth
The Mass of Impacts on Earth The Mass of Impacts on Earth
David P. Bradley (White Earth Oijbwe, and Mdewakaton Dakota), Indian Country Today. David P. Bradley (White Earth Oijbwe, and Mdewakaton Dakota), Indian Country Today.
Video: Multiple Sclerosis Animation

For a complete list of videos, visit our video library