por favor es urgente 1 -¿cuántos átomos- gramos de cloro hay en 88,75 g de dicho elemento? 2-¿calcular los moles de níquel en 18,6g de este metal y los átomos que contiene? 3-¿ determinar el peso de 3,5 moles de HNO? 4-¿hallar ¿cuántas moléculas habrá en 20g de H2 SO4? 5-¿a cuántas moléculas equivale 8 moles de cloruro de sodio?

don't understand your language

answer : a model is often used to explain and make things easier to understand when any scientific topic needs to be demonstrated and explained.

as in this case where a scientist wants to use a model to present the results of his detailed scientific investigation. he should do it as it will him to make the audience understand the concept in a much better way. also, it can be changed according to new scientific understandings.

answer:

the reaction is type of combination reaction.

explanation:

on the product side, there are 2 molecules of bonded to fe   which means one atom of fe are combined two molecules of . so, balanced chemical equation becomes :

this reaction follows the reaction type of combination reaction. a combination reaction is defined as chemical reaction in which reactants combines together to form a single product.