Question

PLEASE HELPPP 100 POINTS!!

1. At 1 atm and 298 k, pentane is a liquid whereas propane is a gas. Explain.
2. At 1 atm and 298 k, methanol is a liquid whereas propane is a gas. Explain.
3. Indicate the hybridization of the carbon atom in each of the following:
i) Methanol
ii) Methanoic (formic) acid
4. Draw the complete lewis electron-dot diagram for a molecule of propanoic acid, HC3H5O2.
5. Explain the following observations about the two carbon-oxygen bonds in the methanoate (formate) anion, HCO2-.
i) The two carbon-oxygen bonds in the methanoate (formate) anion, HCO2-, have the same length.
ii)The length of the carbon-oxygen bonds in the methanoate (formate) anion, HCO2-, is the intermediate between the length of the carbon-oxygen bond in methanol and the length of the carbon-oxygen bond in methanal.

Answer 1

1) pentane is of higher Molecular mass than propane hence heavier member

2) due to intermolecular hydrogen bonding methanol is liquid having lower molecular weight

3) I) in methanol C = sp3

ii) in methanoic acid C= sp2

5)I) i) The two carbon-oxygen bonds in the methanoate anion, HCO2-, have the same length due to resonance stabilization of the C-O bond

Step-by-step explanation:

See attachment for question 4