A flask contains helium and nitrogen gases. The partial pressures of each are
77 mm Hg and 87 mm Hg, respectively.
What is the total pressure in the flask in
mm Hg?

total pressure

=77 mmHg+87 mmHg

=164 mmHg

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? ?

a electronegativity decreases beacuse the size of nucleus is bigger.