This is a paper which indicates whether a solution is acidic or basic

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? ?

o conteúdo de calor de um sistema é igual à entalpia apenas para um sistema que é constante