Titration is the slow edition of one solution of unknown concentration to a noun volume up another solution of unknown concentration until the reaction reaches neutralization which is often indicated by a color change
1. a 2.b 3 a 4. c. 4.a 5. d 6.a. 2Na + Cl2 2NaC 7.c. 3 8.3 9.b
Explanation:
Molecular formulas show correct and accurate number of each type of the atoms which are present in molecule.
On the other hand, structural formulas show arrangement of atoms and covalent bonds between them.
For example,
The molecular formula for carbon dioxide is 
The structural formula is O = C = O
Heat given off by burning coal is Potential Energy and Laser Light is Kinetic Energy.