<span>Carbon must share 4 electrons total with the the two Oxygen atoms in order to fill it's outer electron shell, and each Oxygen atom must share 2 electrons with the Carbon atom to fill their electron shells. Therefore, in total 8 electrons must be shared (4+2+2=8)</span>
You may want to ask the questions seperatly more likely for someone to answer
City B. Higher altitudes have lower boiling points due to lower atmospheric pressure at higher altitudes
C or a one of those hope it helps !!!!
