To determin the amount of Fe in a sample, a 3.735 g of sample is dissolved in suitable solvent, giving a Fe3+ solution, then, Fe3+ ion is precipitated completely as Fe(OH)3. Filtering, rinsing, and igniting the precipitate at 1000C provides 1.705 g of one pure compound. a. Which reagent is best suited to completely precipitate Fe3+ ions? b. Write the diagrams or the chemical equations are described in the above analysis process? c. Calculate the gravimetric factor (GF) and the %w/w Fe in the sample. Given Fe = 56; O = 16.

elements make up everything, and they combine to make compounds.

the answer is c

answer: atomic mass was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version.

explanation:

originally atomic mass was used to arrange elements on the periodic table from left to right in a row. each column then shows similar properties of elements of a group.

in modern periodic table, the atoms are arranged in increasing atomic number. as atomic number represents the number of protons in an atom which is unique for every atom.