Complete the following calculations and round each result to the correct number of significant figures. a. (3.75 - 3.6) x 9.843 =
b. (3.9 + 4.28) / 8.36 =

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.)