Answer:
oxygen, carbon, hydrogen, nitrogen, calcium, and phosphorus.
Explanation:
the mass of the human body is made up of six elements: oxygen, carbon, hydrogen, nitrogen, calcium, and phosphorus.
Answer: It is Mole.
Explanation:
Mole is the SI unit of measurement used to measure the number of things, usually atoms or molecules. One mole of something is equal to 6.02214078×1023 of same things (Avogadro's number).
<span>An example of a homologous structure is the forelimb of a whale, a human, and a dog.
Homologous structures have the same structure, but may have a different function.
Homologous structures indicate a common ancestor.
A homologous structure is an organ or bone that's in common between different animals that demonstrates an anatomical commonality indicating that the animals share a common ancestor. This is in contrast to analogous structures where two unrelated animals have structures with similar forms or functions due to convergent evolution. With that in mind, let's look at the available options and see what fits.
An example of a homologous structure is the wing of a bird and an insect.
* This is an example of an analogous structure, so this is a bad choice.
An example of a homologous structure is the forelimb of a whale, a human, and a dog.
* Exactly. This is a good example of a homologous structure, so this is a good choice.
Homologous structures have the same function but a different structure.
* False. This is a type of analogous structure.
Homologous structures have the same structure, but may have a different function.
* True. A homologous structure is a structure that was present in a common ancestor of different animals. Further evolution may have caused those animals to diverge and the common structure may now be used for different purposes. So this is a good choice.
Homologous structures indicate a common ancestor.
* Yes, by definition.
Homologous structures do not indicate a common ancestor.
* Since the previous option was true, this must be false, so a bad choice.</span>
Partial pressure of gas A is 1.31 atm and that of gas B is 0.44 atm.
The partial pressure of a gas in a mixture can be calculated as
Pi = Xi x P
Where Pi is the partial pressure; Xi is mole fraction and P is the total pressure of the mixture.
Therefore we have Pa = Xa x P and Pb = Xb x P
Let us find Xa and Xb
Χa = mol a/ total moles = 2.50/(2.50+0.85) = 2.50/3.35 = 0.746
Xb = mol b/total moles = 0.85/(2.50+0.85) = 0.85/3.35 = 0.254
Total pressure P is given as 1.75 atm
Pa = Xa x P = 0.746 x 1.75 = 1.31atm
Partial pressure of gas A is 1.31 atm
Pb = Xb x P = 0.254 x 1.75 = 0.44atm
Partial pressure of gas B is 0.44 atm.
Learn more about Partial pressure here:
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The scientist would use an instrument called an Aqua Satellite
