Answer:
1. The graph where x axis and y axis are present is called coordinate.
4. 18
1.6456 x 10^3 (ten to the third power)
The lack of a number preceding the carbon symbol C and the compound formula CO2 shows that there is one carbon atom and one carbon dioxide molecule. Subscript numbers in chemical formulas represent the number of atoms or molecules immediately preceding the subscript.
Answer:A molecule is formed when two or more atoms join together chemically.
Explanation: