Consider the combustion reaction of propane: c3h8(g) + 5 o2(g) ® 3 co2(g) + 4 h2o(g), where dh = – 531 kcal/mol. if 6.70 ´ 104
kcal of energy is released in the reaction, how many grams of oxygen were consumed?

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? ?