The 3d sublevel is not filled until after the 4s sublevel, because the 3d sublevel has more energy than the 4s sublevel, and less energy than the 4p sublevel. (:
The fact that CO2 is released from oceans due to further rise in temperature is an example of a negative feedback.
A negative feedback is one in which the process that produces the feedback is interrupted. That is, the process is stopped as a result of the feedback received.
In this case, CO2 which leads to global warming dissolves in the ocean which serves a large sink for the gas. However, as the increase in ocean temperatures causes decrease in solubility of CO2, more CO2 is released leading to further temperature rise. This is an example of a negative feedback loop.
Learn more: brainly.com/question/13440572
Answer:
Explanation:
Check below for the answer in the attachment.
Answer:
a) Step 1:
![2PbS(g)+3O_2(g)\overset{roasting}\rightarrow 2PbO(s)+2SO_2(g)](https://tex.z-dn.net/?f=2PbS%28g%29%2B3O_2%28g%29%5Coverset%7Broasting%7D%5Crightarrow%202PbO%28s%29%2B2SO_2%28g%29)
Step 2:
![2PbO(s)+PbS(s)\overset{\Delta }\rightarrow 3Pb(l)+SO_2(g)](https://tex.z-dn.net/?f=2PbO%28s%29%2BPbS%28s%29%5Coverset%7B%5CDelta%20%7D%5Crightarrow%203Pb%28l%29%2BSO_2%28g%29)
b) The overall balanced reaction for given process is ;
![3PbS(s)+3O_2(g)\rightarrow 3Pb(l)+3SO_2(g)](https://tex.z-dn.net/?f=3PbS%28s%29%2B3O_2%28g%29%5Crightarrow%203Pb%28l%29%2B3SO_2%28g%29)
Explanation:
a)
Galena = ![PbS](https://tex.z-dn.net/?f=PbS)
Lead(II) oxide = ![PbO](https://tex.z-dn.net/?f=PbO)
Sulfur dioxide = ![SO_2](https://tex.z-dn.net/?f=SO_2)
Step 1:
Roasting the galena in oxygen gas to form lead(II) oxide and sulfur dioxide.
Balanced equation of step 1:
..[1]
Step 2:
Heating the metal oxide with more galena forms the molten metal and more sulfur dioxide.
Balanced equation of step 2:
..[2]
b)
For over all reaction add [1] and [2]. The overall balanced reaction for given process is ;
![3PbS(s)+3O_2(g)\rightarrow 3Pb(l)+3SO_2(g)](https://tex.z-dn.net/?f=3PbS%28s%29%2B3O_2%28g%29%5Crightarrow%203Pb%28l%29%2B3SO_2%28g%29)