Granite and pebbles are the answer
DO NOT CLICK THE LINK THE OTHER PERSON COMMENTED PLS
<span>Fluorine ONLY form\s an ion with a -1 charge. The other three are metals, and metals for positively charged ions.</span>
Since the beaker was heated we can asume that only magnesium cloride is left in the beaker, therfore the difference between the beaker with magnesium chloride and the empty beaker give the mass of magnisium chloride:
Answer:
0.0075÷0.015=0.5 not so sure lol