Question

Carbon dioxide (CO2) is an abundant greenhouse gas that is present in high atmospheric concentration primarily due to an anthropogenic contribution. A primary mode for the natural removal of atmospheric CO is dissolution into the oceans. The following chemical reaction shows the dissolution of CO2 into water forming carbonic acid (H2CO3): CO, aq) H, O H,Co, aq Carbonic acid will then dissociate in water forming the bicarbonate anion (HCO3 Draw the Lewis dot structures for carbonic acid and the bicarbonate anion. O :C:O: H H,CO HCO Incorrect

Answer 1

Lewis structure for Bicarbonate anion:

Note that you just missed the braket stating the -1 charge of the ion

electrons count is correct and perfectly placed

Q2

for

Nitrogen dioxide + water = nitric acid + nitrous acid

NO2 + H2O = HNO3 + HNO2

balance

2 NO2(g) + H2O(l) = HNO3(aq) + HNO2(aq)

Q3

Nitrogen dioxide gas into O2 and N2:

NO2(g) = N2(g) + O2(g)

balance

2NO2(g) = N2(g) + 2O2(g)