how has the scientific model of the atom changed over the centuries and what new evidence led to the various changes in the model

List the two type of transporst that the cell in orde to transport molecules acroos the membrane

After cloud droplets form, what must happen to them for precipitation to occur?

Achemist 16 drop copper metal from copper chloride solution. the chemist place is 0.50 g of aluminum foil in a solution containing 0.75 g of copper (ii) chloride. a single replacement reaction takes place. which statement explains the maximum amount of copper that the chemist can extract using this reaction?