Answer:
When the energy is passed on from one trophic level to another, only 10 percent of the energy is passed on to the next trophic level.
Explanation:
Plants obtain energy from the sun during photosynthesis and pass it along the food chain.
<h3>What is a model?</h3>
A model is a representation of reality. We use models to understand what the real situation of things is like.
Let us recall that plants are the producers in the ecosystem. Energy flow from plants to animals. Plants obtain energy via the reaction 6CO2 + 6H2O --->C6H12O6 + ATP. This energy is passed along the food chain as organisms feed on each other.
Learn more about models: brainly.com/question/14281845
Answer to this is O-atom.
Explanation: The Bronsted acid-base theory is the backbone of chemistry. This theory focuses mainly on acids and bases acting as proton donors or proton acceptors.
where 
is the Lewis Acid and 
is the Lewis Base and 
is the Covalent Bond.
Reaction of dissociation of 
in 
is given as:
In this reaction O-atom has lone pair in water and therefore it accepts the proton from 
forming a Lewis Base.
The substances present before the reaction are the reactants. (As the reaction goes through, the substances that are produced are called the products of the reaction).
Answer:
D
Explanation:
When lead ions and sulfate ions bond, they form sediment so neither a nor b can be the answer.
The important thing is that two nitrate ions were originally bonded with one lead ion, while two potassium ions bonded with a sulfate ion.
Finally, since potassium and nitrate ions don't form sediment these two ions must remain. Therefore the answer is D
