Multiple choice general knowledge science & technology

ammonium sulfate

  1. (NH4)2SO4

  2. NH4SO4

  3. NH4(SO4)2

  4. None of the above
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A Correct answer
Explanation

Ammonium ion is NH4^+ with a +1 charge. Sulfate is SO4^2- with a -2 charge. To balance the charges, two ammonium ions are needed for each sulfate ion, giving (NH4)2SO4. Parentheses are essential around NH4 to indicate two ammonium groups.

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