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

Author Question: Near Earth's surface, ____ occupies about 78 and ____ about 21 of the total volume of dry air. A) ... (Read 89 times)

faduma

  • Hero Member
  • *****
  • Posts: 528
on: Jul 13, 2018
Near Earth's surface, ____ occupies about 78 and ____ about 21 of the total volume of dry air.
 A) nitrogen; oxygen
  B) hydrogen; oxygen
  C) oxygen; hydrogen
  D) nitrogen; water vapor

Question 2

The most abundant gases in Earth's present day atmosphere (by volume) are ____.
 A) carbon dioxide and nitrogen
  B) oxygen and water vapor
  C) nitrogen and oxygen
  D) oxygen and helium


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

xiazhe

  • Sr. Member
  • ****
  • Posts: 331
Reply #1 on: Jul 13, 2018
Answer to Question 1

A

Answer to Question 2

C


faduma

  • Member
  • Posts: 528
Reply 2 on: Jul 13, 2018
Excellent

triiciiaa

  • Member
  • Posts: 349
Reply 3 on: Yesterday
:D TYSM

« previous next »
 

Did you know?

Long-term mental and physical effects from substance abuse include: paranoia, psychosis, immune deficiencies, and organ damage.

Did you know?

Computer programs are available that crosscheck a new drug's possible trade name with all other trade names currently available. These programs detect dangerous similarities between names and alert the manufacturer of the drug.

Did you know?

The Food and Drug Administration has approved Risperdal, an adult antipsychotic drug, for the symptomatic treatment of irritability in children and adolescents with autism. The approval is the first for the use of a drug to treat behaviors associated with autism in children. These behaviors are included under the general heading of irritability and include aggression, deliberate self-injury, and temper tantrums.

Did you know?

The first successful kidney transplant was performed in 1954 and occurred in Boston. A kidney from an identical twin was transplanted into his dying brother's body and was not rejected because it did not appear foreign to his body.

Did you know?

The cure for trichomoniasis is easy as long as the patient does not drink alcoholic beverages for 24 hours. Just a single dose of medication is needed to rid the body of the disease. However, without proper precautions, an individual may contract the disease repeatedly. In fact, most people develop trichomoniasis again within three months of their last treatment.

Animation of the apparent retrograde motion of Mars in 2003 as seen from Earth Animation of the apparent retrograde motion of Mars in 2003 as seen from Earth
(PDB ID 7GCH) (b) A depiction of the enzyme emphasizing its surface (PDB ID 7GCH) (b) A depiction of the enzyme emphasizing its surface
The effective temperature, or black body temperature, of the Sun (5777 K) is the temperature a black The effective temperature, or black body temperature, of the Sun (5777 K) is the temperature a black
Body Wave and Surface Wave Travel Body Wave and Surface Wave Travel
Paramedic Care: Principles & Practice, Volume 1, 5th Edition Paramedic Care: Principles & Practice, Volume 1, 5th Edition
A sphere, 0.30 m in radius, has a surface emissivity of 0.48 and is at a temp A sphere, 0.30 m in radius, has a surface emissivity of 0.48 and is at a temp
Video: Ear Virtual Tour Animation

For a complete list of videos, visit our video library