It is a negative ion that has one more valence electron than a neutral bromine atom. All atoms of the element potassium have 19 protons.
Molar mass of Al = 26.98
molar mass of Al2O3 = 101.96
36 / 26.98 = 1.3343 moles Al
set up a proportion : 1.3343 / 4 = x / 2 (let x = moles of Al2O3)
x = 0.66716 moles of Al2O3
0.66716 * 101.96 = 69.024 g of Al2O3
Hope this helps! The answer is C: Magnetic forces act at a distance
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Explanation:
