D, because C12 means there's 12 atoms of carbon.
The formula of butane is C4H10 but I don't how many atoms it contains though
Phase 3 is the integration phrase
Covalent bonds are strong bonds. Atoms that share pairs of electrons form molecules. A molecule is a group of atoms held together by covalent bonds. A diatomic molecule is a molecule containing only two atoms.
Answer:
A barometer is an instrument used to measure air pressure and track weather systems. The most common unit of measurement used in barometers is the millibar (mb).
Explanation: