Explain why two oxygen atoms bond to a carbon atom to make a stable molecule of a carbon dioxide?

how many hydrogen atoms are needed to form 5 water molecules

which substances form covalent bonds?

10 H atoms combine with 5 oxygen to form 5 water molecules.

Explanation:

those substances which having low boiling point or low melting point such as water they form covalent bond.

Covalent bonds form between non-metal atoms. Each bond consists of a shared pair of electrons, and is very strong. Simple molecular substances and giant covalent structures have different properties.

the darker peppered moth species were favored due to the fact that the industrial revolution had made all the nearby trees a darker color instead of white.

i thinking chemical change