Data:
Molar Mass of Nickel = 58,7 g/mol
Solving:
58,7 g → 1 mol
y -------→ 2.63 mol
Solving: (They are proportional measures, the rule of three is made (directly proportional)

multiply cross

Answer:
I cant see the picture but
heeeerrrrreeeee
Just add up all the "exponents" and you'll get 25 which is Manganese or Mn on the periodic table!
Then why did you ask ??...........
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