The lewis structure is helpful in showing how the bonding between atoms of a molecule are. The lewis structure of ammonia would be that the nitrogen atom will share three pairs of electron with the three hydrogen atoms leaving nitrogen to have 1 lone pair.<span />
El número de Avogadro es 6,022 x 10^23, y es el número de átomos que hay en un mol de dicho elemento. A su vez un mol es la cantidad de un elemento cuya masa en gramos coincide con el peso atómico.
Por tanto, 6,022 x 10^23 átomos del elemento tienen una masa en gramos igual a su peso atómico. Hacemos una regla de tres:
1 gramo -------- 1,5 x 10^22 átomos
x ------------------ 6,022 x 10^23 átomos
=> x = 40,1 gramos por mol del elemento.
De modo que su peso atómico es 40,1. Se trata del calcio.
Saludos.
Combustion is a type of exothermic chemical reaction that generates light and heat in most cases, and occurs fairly quickly.
<h3>What is an exothermic reaction?</h3>
An exothermic reaction is one that when it occurs releases energy in the form of heat or light to the environment.
<h3>Characteristics of an exothermic reaction</h3>
- When this type of reaction occurs, the products obtained have lower energy than the initial reactants.
- Most of the exothermic reactions are oxidation, and when they are very violent they can generate fire, as in combustion.
- Combustion is a very fast oxidation reaction that occurs between materials called fuels and oxygen.
Therefore, we can conclude that combustion is an example of an exothermic reaction that releases large amounts of heat, which can lead to fire.
Learn more about an exothermic reaction here: brainly.com/question/14969584
The cells split up into two to repair the damaged cell so it should be A.
Answer: 2-Methylpentane
Explanation: The numbering is not brought to a minimum.
