A molecular structure is a shape of a molecule, a three-dimensional shape or configuration of a molecule that is dependent on the preferred spatial orientation of covalent bonds to atoms having two or more partners. Attached is the diagram for the molecular structure of So42
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The reaction is balanced
The equilibrium constant is defined as the concentration ratio of the products and reactants. They are not considered pure solids and liquids.

So the answer is option B.
Answer: b. the volume of water vapour increases
Explanation:
when there's an increase in concentration, the equilibrium favours the forward reaction, more product is produced, froward reaction is faster
The first one is the answer
1. They depend on the bacteria to keep animals below their status in the food web, so that they can eat, too.
2a. a single tree monkey, I believe.
2b. a group of tree monkeys, a cluster of trees, a pile of rocks, and a fierce wind.
2c. a group of tree monkeys
3. the Sun; the sun provides energy, which is food, to the plants and algae. Then, they are eaten and so on.
4. energy or food