Answer:
So you know the things about outer space like facts that you might not know
There is no overall change in reactants and products whenever a chemical reaction reaches equilibrium. It is a fundamental point in a reaction.
<h3>Chemical reactions</h3>
A chemical reaction is a process where one or more reactants interact with an enzyme to generate one or more products.
The equilibrium refers to the state where reactants and products are found in the same concentrations.
During the equilibrium, there is no change in the properties of the reaction and the amounts of substances involved remain the same.
Learn more about chemical reactions:
brainly.com/question/6876669
Answer: 12.18 u
Explanation: The average atomic mass of an element is calculated by taking the weighted average of the atomic masses of its stable isotopes.
In other words, each stable isotope will contribute to the average mass of the element proportionally to its abundance.
Answer:

Explanation:
First you should calculate the volume of a big sphere,so:



Then you calculate the volume of a small spehre, so:



Finally you subtract the two quantities:

