One would be phosporous whose configuration is 1s2 2s2 2p6 3s2 3p3
Answer:
Chitin
Explanation:
A fly's main body is made of a thorax and an abdomen. These parts are covered by a hard exoskeleton made of a bony substance called chitin.
Answer:
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Answer:
The tissue cells
Explanation:
I think you mean this

It all starts from Carbondioxide. This Carbondioxide is dissolved in the blood and taken by red blood cell and converted into carbonic acid. It then dissociates to form a bicarbonate ion
and a hydrogen ion 
This <--> means that the whole process is reversible. It is a buffer system to maintain the pH in the blood and duodenum. And also to support proper metabolic function.
Answer:- 30 moles of oxygen are required if 12 moles of
are consumed.
Solution:- The given balanced equation is:

From this balanced equation, there is 2:5 mol ratio between
and
.
We are asked to calculate the moles of
required to react with 12 moles of
.
It's a mol to mol conversion and the set up for this would be as:

= 
So, 30 moles of oxygen are required to react with 12 moles of
.