A reaction of solid c and o2 gas is performed to produce 2 moles of co gas and 1 mole of co2 gas.

i'm assuming that the correct answer is indeed the first one/ "a"..

po-215 i got it right on the quiz

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? ?