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 154 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?

Adults are resistant to the bacterium that causes Botulism. These bacteria thrive in honey – therefore, honey should never be given to infants since their immune systems are not yet resistant.

Did you know?

The newest statin drug, rosuvastatin, has been called a superstatin because it appears to reduce LDL cholesterol to a greater degree than the other approved statin drugs.

Did you know?

Calcitonin is a naturally occurring hormone. In women who are at least 5 years beyond menopause, it slows bone loss and increases spinal bone density.

Did you know?

To combat osteoporosis, changes in lifestyle and diet are recommended. At-risk patients should include 1,200 to 1,500 mg of calcium daily either via dietary means or with supplements.

Did you know?

The effects of organophosphate poisoning are referred to by using the abbreviations “SLUD” or “SLUDGE,” It stands for: salivation, lacrimation, urination, defecation, GI upset, and emesis.

Comparative sizes of the Earth and the Moon Comparative sizes of the Earth and the Moon
The Tilt of Earth’s Axis The Tilt of Earth’s Axis
Tides on Earth Tides on Earth
Earth’s Spheres Earth’s Spheres
Earth’s Revolution and Rotation: The Causes of Earth’s Seasons Earth’s Revolution and Rotation: The Causes of Earth’s Seasons
Earth’s Oldest Preserved Rocks – 3.8 Billion Years Old, Greenland Earth’s Oldest Preserved Rocks – 3.8 Billion Years Old, Greenland
Video: The Lac Operon in E. Coli

For a complete list of videos, visit our video library