If a test tube contains equal concentrations of Ba2+, Pb2+, Cu2+ and Na+, describe how the ions might be separated from one another by "selectively" precipitating one at a time by adding the appropriate negative ions in the correct order. You can filter each precipitate between each reaction. Which positive ion will remain unprecipitated in the solution at the end?

it would be d. henry moseley

hope this !

and sorry if i'm late. have a good rest of your day! : d

a pan containing water is placed in a positio n where it is exposed to a 10 mile per hour wind. the pan contains a uniform depth of 1.27 cm of water, is quite wide, and has a length of 2.44 m in the wind direction. the water in the pan is at a constant temperature of 15.5 °c.

it’s previous models   because when i picked that son of a gun’s answer it was wrong look for previous models because they might make it a different letter  

here are some of the ways in which chemical and nuclear reactions differ.

explanation: