a sample of hydrated chromium (lll) bromide (CrBr3) has a mass of 0.949g. After dehydration the sample has a mass of 0.692g. Which is the correct name for the hydrate?

a. they are both space stations

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the answer is c i took the test

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.