A 23.0 g sample of metal is heated to 100.0°C. A calorimeter contains 75.0 ml of water at 18.5°C. When the sample is added to the calorimeter, the sample and water reach thermal equilibrium at 21.1°C. What is the identity of the metal? A) Mn
B) V
C) Fe
D) N

Although respiratory organs vary across different organisms, they all contain respiratory surfaces that have a large surface area and are extremely thin. explain why having an extremely thin respiratory surface with a large surface area is advantageous for the process of gas exchange

Place the elements below in order of decreasing ionization energy. aluminum(al) chlorine(cl) magnesium (mg) sulfur(s)

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