Complete the lewis dot structure for h2co (in which both h atoms are bonded to c).

On the attached picture.

Explanation:

Hello,

Formic acid is a carboxylic acid composed by one carbon, one oxygen and two hydrogens whose Lewis dots structure is shown on the attached picture wherein a double bond is present between the carbon and the oxygen, and two single bonds between the carbon and each hydrogen. Consider that oxygen has two bonded valence electrons and 4 non-bonded electrons in order to attain and accomplish the octate.

Best regards.

you need to take a look at the periodic system in order to sort these elements into pairs that would most likely exhibit similar chemical properties. first, you need to find elements that are found in the same group (groups are vertical in the periodic system), and then to see whether they have the same valence number. if they meet these criteria, they will have similar properties.

the first pair: ne (neon) and kr (krypton), are noble gases found in group 8

the second pair: li (lithium) and k (potassium), found in group 1

the third pair: s (sulfur) and te (tellurium), found in group 6

answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.