Which safety rule is MOST important when smelling the product of a chemical reaction? Group of answer choices

Keep nose directly above open container.

Hold with tongs

Wear closed -toed shoes.

use a wafting motion.

Why is metal often used for cooking pan?

The necleus of an atom is made up of what subatomic particles?

In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 j? 1. write the equation 2.list out your known variables 3.plug the numbers into the equations 4.solve 5.write your solution statement that includes initial energy and final