Butane, c4h10, reacts with oxygen, o2, to form water, h2o, and carbon dioxide, co2, as shown in the following chemical equation: 2c4h10(g)+13o2(g)-> 10h2o(g)+8co2(g). calculate the mass of water produced when 1.77 grams of butane reacts with excessive oxygen? calculate the mass of butane needed to produce 71.6 of carbon dioxide

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.