What is the ph of a solution with a hydronium ion concentration of 5.6 x 10^-9

We just started a new lesson in chemistry and everyone hates it and i dont get it one bit. i hate school. h el p.balanced equationc3h8+5o2-> 3co2+4h2o1.) if you start with 14.8g of propane(c3h8) and 3.44g of oxygen, which is the limiting reactant -check my answer 2.)what mass of excess reagent is left over? 3.)what mass of carbon dioxide can be made? 4.)what mass of water is produced?

What is the oxidation state of each individual carbon atom in c2o42−?

Select the correct location on the image identify the element that humans need to breathe. 2015 er r ights reserved