7. An exothermic reaction
8. The bonds are forming
The best answer would be A.) stay in the car.
-do not have windows open, and do not touch the outside of the car.
17) 8.4 / 20 x 100
18) 20 . 0.5150
19) 6,50% because (as you said) the law of definite proportions states that regardless of the amount, a compound is always composed of the same elements in the same proportion by mass
