The teacher puts vinegar into a small container of baking soda. the the combined substance begins to fizz and bubble. what type of change is this and why?

clouds form

solid ice forms on leaves.

water droplets form on grass.

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.

it is b that is the answer.

the answer is a! (2.9 x 10^-18 j) hope i could someone. : )