Con el fin de disminuir la temperatura de ebullición del agua contenida en un depósito, se disuelven en el mismo y en una concentración del 3% en peso, una sustancia de formula empírica (C2H6O)n, originándose un descenso en la presión de vapor, a 20 °C, de 0,209 mmHg. ¿Cuál es la temperatura de congelación de dicha disolución?

what

Explanation:

what

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.

the answer is 1 i believe