When you wake up early, and go brush your teeth the toothpaste is made of chemical compounds, the water that you use to wash your faceis treated chemically. To make the coffee sugar or sweetener has chemical compounds.
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Answer:
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Explanation:
D, and the system combine to form organism
a system is the breathing one for example
N2O4Pb. Chemical Names: 13826-65-8. Lead nitrite. Nitrous acid, lead(2+) salt.
