how many grams of Fe are needed to react with 8.0g of O2 to produce 28.9 g of Fe3O4 according to the equation 3Fe+2O2—> Fe3O4

What term is missing from the central region that describes hypotheses, theories, and laws? popular predictable mathematical falsifiable

An atom's configuration based on its number of electrons ends at 3p4. another atom has seven more electrons. starting at 3p, what is the remaining configuration? 3p63d34s2 3p43d54s2 3p64s23d3 3p44s23d

How are the terms group and period used on the periodic table