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
lina2011 [118]
3 years ago
14

Which organ is a part of circulatory system? a. brain b. heart c. lungs d. stomach

Chemistry
2 answers:
Mumz [18]3 years ago
7 0
B is the answer   4 that        :)                           
statuscvo [17]3 years ago
3 0
The brain is part of the neurological/nervous system, the lungs are part of the pulmonary system, and the stomach is the key component of the digestive system. This leaves the answe "B", the heart, as the answer because it is the pump in every mammalian body that drives blood flow leaving the heart through arteries and returning deoxygenated through the veins.
You might be interested in
Which phrase describes a hypothesis? a. reviewing information related to the problem b. testing a factor, or variable, in an exp
monitta

Answer:

c. suggesting a solution to a problem after studying it carefully

Explanation:

Hypothesis generally refers to an assumption made. This assumption can either be true or false. It is a reasoning presented in order to explain a phenomenon and is the starting point for further investigation.

Among the options, the closest that best describes it is option C.

4 0
3 years ago
Balance the following skeleton ionic reaction, and calculate E°cell to decide whether the reaction is spontaneous: Ag(s) + Cu2+
tia_tia [17]

Answer:

2Ag(s) + Cu^2+(aq) ----------> 2Ag^+(aq) + Cu(s)

Explanation:

Ag(s)/Ag^+ (aq) is the anode as shown while Cu^2+(aq)/Cu^2(s) is the cathode.

E°cell= E°cathode -E°anode= 0.34 -0.80= -0.5V

The cell is not spontaneous as written because E°cell is negative. This implies that the electrodes of the cell must be interchanged to make the cell spontaneous.

5 0
3 years ago
Read 2 more answers
During a storm, a tree fell over into a river. What might happen to this tree?
mina [271]
Break down in to tiny prices as the water hit the tree
6 0
3 years ago
Why do we need to balance chemical equations?
Mrrafil [7]
So we know the number of moles of each compound. If we need to know the concentration we must know the number of moles that the compounds react with...

8 0
3 years ago
Read 2 more answers
PLEASE HELP ME I BEG YOU
VladimirAG [237]

The average kinetic energy of 1 mole of a gas at -32 degrees Celsius is:
 
3.80 x 103 J

The relationship between volume and temperature of a gas, when pressure and moles of a gas are held constant, is: V*T = k.

FALSE

The relationship between moles and volume, when pressure and temperature of a gas are held constant, is: V/n = k. We could say then, that:
If the moles of gas are tripled, the volume must also triple.


 If the temperature and volume of a gas are held constant, an increase in pressure would most likely be caused by an increase in the number of moles of gas.

TRUE

If the vapor pressure of a liquid is less than the atmospheric pressure, the liquid will not boil.

TRUE


35 - AB

36 -  BD

33 - true

34 - False

20 - 6

21 - orthohombic


4 0
3 years ago
Other questions:
  • A bus traveled south west for 422 kilometers. The entire trip took 3 hours. Calculate the velocity.
    8·1 answer
  • 問上面照片的題目,何者不是構成蛋白質的主要成分原素?
    6·1 answer
  • Based on the chemical equation, use the drop-down menu to choose the coefficients that will balance the chemical
    6·2 answers
  • The gas carbon dioxide is a pure substance. Which of the following is true about carbon dioxide ?
    8·1 answer
  • Please get me the right answer
    5·1 answer
  • H
    12·1 answer
  • 0.398 mol AgNO3 and 2.73 mol NH3 were added to enough water to give 1.00 L of solution at 25 °C. Calculate the equilibrium conce
    5·1 answer
  • Where do all the carbons of glucose end up when glucose is completely oxidized?
    11·2 answers
  • What is conservation of matter? What is matter??<br> PLEASEEE HEELPPP
    11·2 answers
  • what bodyy system Filters waste materials (esp. nitrogenous wastes) from blood; maintain water, salt, acid/base, &amp; ion balan
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!