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
fgiga [73]
3 years ago
13

The atria beat prior to the ventricles. What purpose does this serve?

Chemistry
1 answer:
Zarrin [17]3 years ago
4 0

Answer:

The atria and ventricles work together, alternately contracting and relaxing to pump blood through your heart. The electrical system of your heart is the power source that makes this possible.

Your heartbeat is triggered by electrical impulses that travel down a special pathway through your heart:

Explanation:

Hope this helps

You might be interested in
Which oh these statements describes a chemical property?
Gelneren [198K]

Iron rusts when exposed to air → chemical property

3 0
3 years ago
Mario believes he has found the reason that some things glow in the dark while others do not. What is the most important thing h
Citrus2011 [14]

the answer is d, cuz i just did it rn on my study island and i got it right :)

4 0
3 years ago
Read 2 more answers
what is the percent by mass of NaHCO3 in a solution containing 20.0 g of NaHCO3 dissolved in 600.0 ml of water
Ne4ueva [31]
%(NaHCO3)= ((mass NaHCO3)/(mass NaHCO3 + mass water))*100%

m=Volume*Density
Density of water =1 g/ml
m(water) = Volume(water)*Density(water) = 600.0 ml * 1g/ml=600g water

%(NaHCO3)= ((20.0 g)/(20.0 g + 600 g))*100%=0.0323*100%=32.3%
7 0
4 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
Which of the following could not act as a medium for a mechanical wave?
Y_Kistochka [10]
I believe it is either A or B
7 0
3 years ago
Read 2 more answers
Other questions:
  • How many moles of carbon dioxide will be produced from the complete combustion of 13.6 moles of butane?
    11·1 answer
  • What can be explained by the Arrhenius theory?
    13·1 answer
  • Dipole-induced dipole attractions exist between molecules of water and molecules of gasoline, yet these two substances do not mi
    10·1 answer
  • Which of the four macromolecules are the largest
    5·1 answer
  • 50 POINTS.
    11·2 answers
  • Are polyatomic ions molecular compounds or ionic compounds?
    5·1 answer
  • The mass of a watch glass was measured four times. The masses were
    9·2 answers
  • If kb for nx3 is 4.0×10−6, what is the poh of a 0.175 m aqueous solution of nx3?
    12·1 answer
  • A student finds a puddle of water in a garden and takes a sample he wants to perform an experiment to determine if they are livi
    6·1 answer
  • What is the mass of 2.49 moles of sucrose?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!