Couple of things:
1: only one type of bacteria was discovered metabolising sulphur, this does not necessarily mean that other bacteria, or indeed another organism can also metabolise sulphur. For his theory to be correct, many more and different types of organisms, metabolising sulphur needs to be discovered.
Secondly the use of the word diverse infers that more than just bacteria can metabolise sulphur. Bacteria are unicellular (single-celled) organisms, we therefore cannot say that multicellular organism can also do this, it could be specific to that one type of bacteria.
Answer:
Option (D)
Explanation:
Bowen's reaction series usually represents the ranking of the mineral formation at different temperature conditions. There are two branches namely the continuous and the discontinuous branch.
The main objective of this series is to enable a viewer to understand at what temperature mineral forms, that give rise to the formation of igneous rocks.
It is very commonly used by the geologists and the mineralogists as it helps them in evaluating and predicting the order in which a particular type of mineral will form.
Thus, the correct answer is option (D).
Answer: I believe the 1st and 3rd reactions are better obtained through reference sources and the 2nd and 4th are easiest and safest to measure in the laboratory.
Explanation:
I am also working on this Pre-lab right now, and I looked back at the first question to help get my answer. In the first question (a), it is noted that ammonia gas and gaseous hydrochloric acid are both potentially dangerous in gaseous form. I saw that both the 1st and 3rd reactions contained noxious gases (I knew this because there was a (g) in both of these reactions). Using the knowledge from the first question that the noxious gases were potentially dangerous, I assumed that those reactions were the ones that are better obtained through the reference sources. The 2nd and 4th reactions did not contain any noxious gases, so I assumed those ones were easiest and safest to measure in the laboratory. Hope this helps!
The answer should be D.)The decay rate does not change
<span>A radioisotope is not stable and will undergo a nuclear decay that will continually decrease its mass. Unlike a chemical reaction, the </span>rate of nuclear decay is not influenced by the temperature of the surface area. So, increases in surface area and decreased temperature will not have any effect.
