The answer is most likely D
<h2>Answer:</h2>
<u>Option B (S ^-2) is the correct answer</u>
<h2>Explanation:</h2>
Sulfur or sulfur is a chemical element with symbol S and atomic number 16. It means that it has 16 protons and 16 electrons. But when an atom of Sulfur gains two electrons, a minus 2 charge comes over it. Therefore it becomes an ion. So if it gained two electrons its electrons become 18 that is why S-2 is the correct answer.
Answer:
7.81 moles
Explanation:
(4.7×10^24 )×1 moles divided by 6.02×10^23 molecules
In order of increasing percent water content:CoCl₂.6H₂O, Ba(OH)₂.8H₂O, MgSO₄.7H₂O
<h3>Further explanation</h3>
CoCl₂.6H₂O.MW=237.90 g/mol
6H₂O MW = 6.18=108 g/mol
MgSO₄.7H₂O.MW=246.48 g/mol
MW 7H₂O = 7.18=126 g/mol
Ba(OH)₂.8H₂O MW=315.48 g/mol
MW 8H₂O = 8.18=144 g/mol