What is the basis for the classification of organic compounds?

Which of these best describes an ionic bond?

100 grams of molten lead (600°c) is used to make musket balls. if the lead shot is allowed to cool to room temperature (21°c), what is the change in entropy (in j/k) of the lead? (for the specific heat of molten and solid lead use 1.29 j/g⋅°c; the latent heat of fusion and the melting point of lead are 2.45 × 104 j/kg and 327°c, respectively.)

How many moles of co2 are produced during the complete combustion of 3.6 moles of c2h6