Why is oxygen written with a subscript 2 in CO2?
.
A. Its mass is twice as great as the reactants'.

B. Each molecule of carbon dioxide has two oxygen atoms.

C. Its mass increases by two times as a result of the reaction.

D. Carbon always bonds to two oxygen atoms.

the answer is b because C+o2

c= carbon, o= oxygen

b..

is the correct one

explanation:

covalent bonds form as valence electrons are shared between two atoms. lewis structures and structural formulas are common ways of showing the covalent bonding in organic molecules. formal charge describes the changes in the number of valence electrons as an atom becomes bonded into a molecule.

fire could start, buildings collapsing, and ash falling from the sky.

explanation:

this is because the buildings or plants could catch on fire and the buildings would most likely collapse. lastly ash would fall because all the burning would cause ash to fall from the sky.

hope this .