D) physical and chemical changes
A. to push each other away
Answer:
D. increase of carbon dioxide
Explanation:
Breathing is automatic and is controlled subconsciously by respiratory center at base of brain. It continues during the time of the sleep and even when the person is not in conscious. Sensory organs in brain and in aorta and the carotid arteries monitor blood and sense the oxygen and the carbon dioxide levels. <u>Usually, increased concentration of the carbon dioxide is the strongest stimulus for the breathing to occur more deeply and more frequently. </u>
When carbon dioxide concentration in the blood is high, the brain increases the frequency and the depth of breaths.
The question is incomplete. Complete question is attached below
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Answer:
Equilibrium constant (K) is defined as the ratio of concentration of product to concentration of reactant.
For the reaction: 2H2O(g) ↔ 2H2(g) + O2(g)
Equlibrium constant =
![\frac{[H_2]^2[O_2]}{[H_20]^2}](https://tex.z-dn.net/?f=%20%5Cfrac%7B%5BH_2%5D%5E2%5BO_2%5D%7D%7B%5BH_20%5D%5E2%7D%20)
[ ] bracket in above expression indicates concentration.
Answer:
2. A resistor
3. Transistor
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