Litharge, PbO, is an ore that can be roasted (heated) in the presence of carbon monoxide, CO, to produce elemental lead. The reaction that takes place during this roasting process is represented by the balanced equation below.
PbO(s) + CO(g) ! Pb(`) + CO2(g)
Calculate the percent composition by mass
of oxygen in litharge (gram-formula mass = 223.2 grams per mole). Your response must include both a numerical setup and the calculated

Agas has a volume of 0.7 l at 300 mmhg. what would be the new volume at 900 mmhg

What diagram shows the ionic compound of magnesium oxide

Two nitro no2 groups are chemically bonded to a patch of surface. they can't move to another location on the surface, but they can rotate (see sketch at right). it turns out that the amount of rotational kinetic energy each no2 group can have is required to be a multiple of ε, where =ε×1.010−24 j. in other words, each no2 group could have ε of rotational kinetic energy, or 2ε, or 3ε, and so forth — but it cannot have just any old amount of rotational kinetic energy. suppose the total rotational kinetic energy in this system is initially known to be 32ε. then, some heat is removed from the system, and the total rotational kinetic energy falls to 18ε. calculate the change in entropy. round your answer to 3 significant digits, and be sure it has the correct unit symbol.