The smallest particle of a compound that retains the properties of the compound is called a(n) a. atom. b. matter. c. element. d. molecule.

Iknow the answer is a but i don't know why

V1t2 = v2t1 is an expression of who’s law

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.)