Which of the following materials contains components in a fixed ratio?

a.
element

b.
compound

c.
mixture

d.
solution

under a microscope, cancer cells may look very different from normal cells. they often have different sizes and some may be larger than normal while others are smaller. cancer cells are often abnormally shaped and the control centre of the cell (the nucleus) may have an abnormal appearance.

i think? ?

fe 55.85 g/mol and h2o 18.02 g/mol.