Cho mẫu kẽm vào ống nghiệm chứa dd HCL(dư)

Ionic compounds are made of ions, and yet the overall charge of an ionic compound is neutral. why?

The excretory system,need answers for all: )

If the concentration of phosphate in the cytosol is 2.0 mm and the concentration of phosphate in the surrounding fluid is 0.1 mm, how could the cell increase the concentration of phosphate in the cytosol? a) passive transportb) diffusionc) active transportd) osmosise) facilitated diffusion