Explanation:
What happens during gas exchange in the alveoli?
These are called alveoli. They inflate when a person inhales and deflate when a person exhales. During gas exchange oxygen moves from the lungs to the bloodstream. At the same time carbon dioxide passes from the blood to the lungs.
What is the role of alveoli in gas exchange?
The alveoli are where the lungs and the blood exchange oxygen and carbon dioxide during the process of breathing in and breathing out. Oxygen breathed in from the air passes through the alveoli and into the blood and travels to the tissues throughout the body.
A solid would have a defined shape
Answer:
The eight protons in oxygen atom's nucleus will exert more force than nitrogen's seven electrons. Also, oxygen has same number of shells as nitrogen. Thus electrons in oxygen atom will be closer to nucleus than in the case of nitrogen. When electrons are closer it means atomic radius is smaller.
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Answer:
The answer is
<h3>3.75 × 10²⁴ atoms of Al</h3>
Explanation:
To find the number of atoms of Al given it's number of moles we use the formula
<h3>N = n × L</h3>
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question
n = 6.23 mol
We have
N = 6.23 × 6.02 × 10²³
We have the final answer as
<h3>3.75 × 10²⁴ atoms of Al</h3>
Hope this helps you
<u>Answer:</u> The number of atoms of plutonium present in given number of moles are ![3.7\times 10^{24}](https://tex.z-dn.net/?f=3.7%5Ctimes%2010%5E%7B24%7D)
<u>Explanation:</u>
We are given:
Number of moles of plutonium metal = 6.1 moles
According to mole concept:
1 mole of an element contains
number of atoms.
So, 6.1 moles of plutonium will contain =
number of plutonium atoms.
Hence, the number of atoms of plutonium present in given number of moles are ![3.7\times 10^{24}](https://tex.z-dn.net/?f=3.7%5Ctimes%2010%5E%7B24%7D)