Diane is able to dissolve 25g of coffee whitener in 250mL of 30°C water before it reaches saturation point. What is the solubility of the coffee whitener at 30°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.  

∠gdh and ∠edh on edg.

answer is c