A 1.000-L sample of polluted water was analyzed for lead(II) ion, Pb2 , by adding an excess of sodium sulfate to it. The mass of lead(II) sulfate that precipitated was 251.6 mg. What is the mass of lead in a liter of the water

1) these are barrel shaped microtubules in most animal cells, that organize the spindles during cell division

How many liters of ethylene glycol antifreeze (c2h6o2), with a density of 1.100 g/l, would you add to your car radiator containing 15.0 kg of water if you needed to protect your engine to - 21.5°c? for water, kf = 1.86°c m -1.

Suppose that some of the compound spilled out of the crucible after it was heated. would that cause the percent by mass of water in the compound determined by the experiment to be too low, too high, or unchanged? briefly explain your answer.