The standard heat of formation for sulfur dioxide gas is 296.8 kJ/mol. Calculate the
amount of energy given off when 34 g of
SO2(g) is formed from its elements.
Answer in units of kJ

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.

where are the choice options?

they vary. it used to be meat, grain, bread, candy, beverages, donuts, and fruits/vegetables. now they added exercise in.