Sample of impure magnetite fe3o4 weighting 1.542g is dissolved by iron oxidized to fe+3 and participated as fe(oh)3, the precipitate is ignited to fe2o3 giving a weight of 1.485g. calculate the percentage of fe2o4 in the sample.

The ph of carrots are 5.0 how it is classified a.acidic b.basic c.indicator d.neutral

If the atomic mass of an atom is 34 and the atom contains 13 protons, how many neutrons does the atom contain?

Which of the following is not a good technique for managing used oil? a) have specific, labeled catch pans available for technicians who are collecting oil b) spills in your shop and any releases on pavement or outside should be poured down a drain c) do not use oil containers for antifreeze or other non-similar fluids d) be prepared for oil spills with the proper absorbents