The mass of oxygen and hydrogen must be equal to the mass of the substance they create the water. So if the hydrogen is 2.8 g the oxygen must account for the rest of the mass. Basically just subtract 25.4-2.8=mass of oxygen
<span>B) a cube with a ball stuck on each of its eight corners and one suspended at its center </span>
Answer; both inside the cell body and inside the axon.
