1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
lorasvet [3.4K]
2 years ago
6

Which is a diatomic molecule? Select one: a. CH4 b. H2O c. O2 d. N

Chemistry
1 answer:
Alexxandr [17]2 years ago
5 0
C o2 is a diatomic molecule

You might be interested in
Is this a scientific model? Use complete sentences to explain why or why not.
tensa zangetsu [6.8K]

Answer:

Yes it is a scientific model because it is an outlook of a winter outlook and winter is a season and a type of weather and weather is meteorology and meteorology is a type of science so yes it is a scientific model.

Explanation:

8 0
2 years ago
Identify the arrows that show removal of thermal energy when matter changes state.
BARSIC [14]
When matter loses heat, one of the following happens:
Liquid changes to solid (freezing), or
Gas changes to liquid (condensation), or
Gas changes to solid (deposition)

1- Freezing: when the temperature of a liquid matter drops below its freezing point, the liquid usually solidifies forming crystals. Example of this is when water changes to ice
2- Condensation: when the temperature of gas is reduced, the molecules slow down and come together changing the matter into liquid. Example of this is when water vapor condenses into water droplets.
3- Deposition: Sometimes when the temperature of a gas drops, it solidifies directly without passing through the liquid phase. An example of this is when water vapor changes directly to ice in sub-freezing areas without passing through the liquid phase. This is the process through which clouds are formed.
The diagram below shows these three changes in matter. 

6 0
3 years ago
: Citric acid, H3C6H5O7, is a triprotic acid. Consider a buffer system comprising H2C6H5O7 - and HC6H5O7 2- ions. What is the ne
olchik [2.2K]

Answer:

The Net reaction is    

  1.    H_3C_6H_5O_7 + 0H^- ----> H_2C_6H_5O_7^- +H_2O \ \ \ \ \ \ \ Main \ Reaction
  2.    H_2C_6H_5O_7^ - + OH^- ----> H_C_6H_5O_7^{ 2-} + H_2O \ \ \ \ Add \ NaOH
  3.    HC_6H_5O_7 ^{2-} + OH^- ---> C_6H_5O_7^{3-} +H_2O \ \ \ \ \ Add \ NaOH  

Explanation:

From the Question we are told that the buffers are

                H_2C_6H_5O_7^ - and  HC_6H_5O_7 ^{ 2-}

When NaOH is added the Net ionic reaction would be

  1.    H_3C_6H_5O_7 + 0H^- ----> H_2C_6H_5O_7^- +H_2O \ \ \ \ \ \ \ Main \ Reaction
  2.    H_2C_6H_5O_7^ - + OH^- ----> H_C_6H_5O_7^{ 2-} + H_2O \ \ \ \ Add \ NaOH
  3.    HC_6H_5O_7 ^{2-} + OH^- ---> C_6H_5O_7^{3-} +H_2O \ \ \ \ \ Add \ NaOH  

             

8 0
3 years ago
Read 2 more answers
How do scientists do background research on topics they have question about
Aliun [14]
They use information from other things that relate to that topic and then use that to do their research
3 0
3 years ago
HELP When a scientist thinks of a reason for why he or she observed something, this reason is called _______.
nydimaria [60]

Answer:

an inference

Explanation:

3 0
3 years ago
Read 2 more answers
Other questions:
  • How many electrons are in lead?
    6·1 answer
  • Why is water clarity an important measure of water quality?
    11·1 answer
  • How many protons does an atom of Iodine (I), #53, have if it has an atomic mass of 127?
    7·1 answer
  • Select all of the statements that are true about a buffer solution. Select one or more: a. A buffer solution reacts with basic s
    7·1 answer
  • During an experiment, iron powder and sulfur powder were mixed thoroughly and placed on a filter paper. When a magnet was moved
    5·2 answers
  • Putting a straw in a glass of water can often make the straw look broken, even though it is in perfect condition. Which of the f
    14·1 answer
  • The warming of earths surface and lower atmosphere that occurs when greenhouse gases absorb reradicate is called the
    9·1 answer
  • Describe the attraction between 2 atoms as a result of sharing electrons
    14·1 answer
  • A single atom of calcium could combine with a single atom of fluorine, creating electron energy stability for both atoms. True F
    13·1 answer
  • Which of the following statements about ions is NOT CORRECT?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!