40 points pls (10 more if its not plaigerized plsss) thank you (if u just do it for points u will get reported bc its not the right thing to do) other than that tyy

Why is nh3 classified as a polar molecule

This image is an example of a(n) a) atom. b) compound. c) mixture. d) molecule.

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.)