Answer:
Explanation:Copper can be extracted from its ore by: Underground: sinking a vertical shaft into the Earth to an appropriate depth and driving horizontal tunnels into the ore. ... The ore is treated with dilute sulfuric acid. This trickles slowly through the ore dissolving copper to form copper sulfate.
Covalent bonds hold hydrogen and oxygen together.
For SiS₂, silicon disulfide, the electron dot formula could be seen in the attached picture. The total nonbonding electron pairs in a SiS₂ molecule is: 4 pairs.
<h3>What are the Lewis structure and nonbonding electron?</h3>
The electron dot formula, also known as the Lewis structure, is a representation of the total valence electrons of atoms within a molecule. By writing an electron dot formula, we can visualize the existence of valence electrons and whether they are within bonds or just stand as lone pairs.
The nonbonding electron or the lone pairs are electrons within an atom that are not forming a bond with the other atoms in a molecule. In the SiS₂ molecules, the 4 nonbonding pairs exist both in S atoms.
Learn more about bond order here brainly.com/question/9713842
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Answer:
it would be c
Explanation:
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It is responsible for exchange of gases of oxygen and carbondiòxide and in this process energy is also released in form of glucose