Why is it important to put food away immediately after you are done with it rather than letting it sit out?

to prevent the food from rotting and bacteria from the air getting into it and keeps the food fresh longer

It will start to rot and get spoiled if you just leave it to sit out. Things like bugs would be able to get to it as well, and it ultimately becomes inedible.

Explanation:

1. entire bag, then the entire bag of calories

2. the percent of fat would be the percent of fat from the serving size, added up to the entire bag of calories

3/4. the saturated fat would be on the bag label, but im pretty sure if you take the serving size and do the math to figure it out you could find out in total the fiber, saturated fat,etc..

5. no probably not