9. Gold is produced electrochemically from an aqueous solution of Au(CN)2- containing excess of CN- Gold metal and oxygen gas are produced at the electrodes. What amount of (moles) of O2 will be produced during the production of 1.00 mole of gold?

The air exhaled from the lungs of a smoker has a concentration of 24 ppm co. express the concentration as a percent.

Hot air balloons float in the air because of the difference in density between cold and hot air. in this problem, you will estimate the minimum temperature the gas inside the balloon needs to be, for it to take off. to do this, use the following variables and make these assumptions: the combined weight of the pilot basket together with that of the balloon fabric and other equipment is w. the volume of the hot air inside the balloon when it is inflated is v. the absolute temperature of the hot air at the bottom of the balloon is th (where th> tc). the absolute temperature of the cold air outside the balloon is tc and its density is ďc. the balloon is open at the bottom, so that the pressure inside and outside the balloon is the same. as always, treat air as an ideal gas. use g for the magnitude of the acceleration due to gravity.

How many grams of co(g) are there in 74.5 ml of the gas at 0.933 atm and 30o c?