... weather balloon is filled with 1.0 liter of helium at 23& ... of a soluble lead salt, what is the percentage of lead ... moles Pb^2+ to grams using the molar mass of Pb ...
... than room air such as a helium:oxygen gas ... a 3-L mixing chamber by a mass spectrometer (Model ... control subjects were used to determine percent predicted values ...
... so for the toal of x + (1 - x) = 1 mol of the mixutre, its molar mass is mass / total moles = (32 ... It finds the mole percentage of the helium-oxygen mixture...
