Can someone pls help me with a paragraph of what endangered wildlife means ?

How would the number of moles (n) of o2 change if the atmospheric pressure doubled but all other variables stayed the same

Consider the following reactions. (note: (s) = solid, (l) = liquid, and (g) = gas.) mg(s) + ½o2(g) → mgo(s) + 146 kcal/mole h2(g) + ½o2(g) → h2o(g), δh = -57.82 kcal/mole what type of reaction is represented by the previous two examples?

What is the percent by mass of oxygen in fe2o3