How many molecules are present in 4.5
moles of H2O?

Mole of the H2O = 4.5

Number of molecules =4.5 multipled by avogadro's number.

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? ?

i don,t know so just answer mine