Look at the diagram of a voltaic cell below. Which half reaction occurs at the cathode in this cell?

A. 2CO⅔- ---> O2 + 2CO2 + 4e‐
B. O2 +2CO2 + 4e- ---> 2CO⅔-
C. 2H2 + 2CO⅔- ---> 2H2O + 2CO2 + 4e-
D. 2H2O + 2CO2 + 4e- ---> 2H2 + 2CO⅔-​

Name the following chemical compound: ca(c2h3o2)2

Non renewable resources like petroleum eventually

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.)