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

Author Question: The earth's atmosphere contains ________; ________. A) 78 nitrogen; 21 oxygen B) 78 hydrogen; 21 ... (Read 144 times)

shenderson6

  • Hero Member
  • *****
  • Posts: 573
on: Jun 23, 2018
The earth's atmosphere contains ________; ________.
 
  A) 78 nitrogen; 21 oxygen B) 78 hydrogen; 21 oxygen
  C) 21 nitrogen; 78 oxygen D) 21 inert gases; 78 oxygen

Question 2

Which statement is true about hydrocarbons?
 
  A) Unburned fuel can be classified as hydrocarbons
  B) They contribute to the formation of smog
  C) Both A and B
  D) Neither A nor B


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Kedrick2014

  • Sr. Member
  • ****
  • Posts: 359
Reply #1 on: Jun 23, 2018
Answer to Question 1

A

Answer to Question 2

C


shenderson6

  • Member
  • Posts: 573
Reply 2 on: Jun 23, 2018
Excellent

miss.ashley

  • Member
  • Posts: 371
Reply 3 on: Yesterday
Wow, this really help

« previous next »
 

Did you know?

In 1844, Charles Goodyear obtained the first patent for a rubber condom.

Did you know?

Methicillin-resistant Staphylococcus aureus or MRSA was discovered in 1961 in the United Kingdom. It if often referred to as a superbug. MRSA infections cause more deaths in the United States every year than AIDS.

Methicilli ...
Did you know?

There are actually 60 minerals, 16 vitamins, 12 essential amino acids, and three essential fatty acids that your body needs every day.

Did you know?

The toxic levels for lithium carbonate are close to the therapeutic levels. Signs of toxicity include fine hand tremor, polyuria, mild thirst, nausea, general discomfort, diarrhea, vomiting, drowsiness, muscular weakness, lack of coordination, ataxia, giddiness, tinnitus, and blurred vision.

Did you know?

Green tea is able to stop the scent of garlic or onion from causing bad breath.

The Sun is the nearest star to Earth. The Sun is the nearest star to Earth.
Directionality of the hydrogen bond Directionality of the hydrogen bond
Layers are deposited parallel to Earth’s surface. Younger layers are deposited on top of older layer Layers are deposited parallel to Earth’s surface. Younger layers are deposited on top of older layer
A typical good oxygen sensor waveform as displayed on a digital storage oscilloscope. Look for ... A typical good oxygen sensor waveform as displayed on a digital storage oscilloscope. Look for ...
Volcanoes eject reflective aerosols into the atmosphere Volcanoes eject reflective aerosols into the atmosphere
Earth 240 Million Years Ago Earth 240 Million Years Ago
Video: Factors that affect conduction rates (myelination, axon diameter & temperature)

For a complete list of videos, visit our video library