1. What is the relative atom mass of the element whose isotopes composition is 90% of 20, and 10% of 22, ?​

Which object forms when a supergiant runs out of fuel? a red giant a black hole a white dwarf a neutron star

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

Is this correct if not can u correct me