Answer: The correct answer is option 3) The amount of matter within the system remains the same and 5) The cycle has a well-defined starting and stopping point.
A closed system can be defined as a system in which there is the only exchange of energy with the surrounding, while no exchange of matter takes place.
In a closed system, the cycle has a well-defined starting and stopping point.
Therefore, the two generalizations which can be made for cycles of matter in a closed system are option 1) and 5)
Answer:
In water molecules
Explanation:
"Scientists estimate that 50-80% of the oxygen production on Earth comes from the ocean. The majority of this production is from oceanic plankton — drifting plants, algae, and some bacteria that can photosynthesized"
Answer: 22 pairs + 3 sex chromosomes =47 chromosomes
Explanation: This is a trisomic disorder
The nucleus contains 7 protons (positively charged) and 7 neutrons (no charge). In the first electron orbital, you have 2 electrons (negatively charged). In the second orbital you have 5 electrons. The atom would become stable if the outer electron orbital was filled. Because the second orbital can hold up to eight electrons, you need to have three more electrons to fill it. This would require another nitrogen atom--the two atoms become hybridized and effectively share each other's valence electrons. What you end up with is two nitrogen atoms joined together with a triple bond, where each nitrogen atom shares three valence electrons with the other, and each also has two unshared valence electrons. That is why atmospheric nitrogen exists as N2.
