O2 (oxygen) is a covalent compound
Answer:
At first, we should know their molecular formula and symbol. In case of element, symbols are written. But in case of compound, molecular formula is used. Also we should know their coefficient (number) to make the number of atoms either side equal.
The answer is sediments because sediments break down and are every where on earth also break down due to weathering
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<span>Only a single amino acid could change, because the reading frame is unaffected</span>
