What is the Rationale for learning the pH of everyday substances?

What is the percent by mass of oxygen in fe2o3

What is the ph of a solution that has a hydrogen ion concentration of 1.0 * 10 -9 m?

Count the number of each type of atom in the equation below, and then balance the equation. write in the numbers of atoms and coefficients. add a 1 if there should be no coefficient. cs2(l) + o2(g) → co2(g) + so2(g) c [ ] s [ ] o > c [ ] s [ ] o [ ] cs2(l) + [ ] o2(g) > [ ] co2(g) + [ ] so2(g)