Question

what is the formula for ammonium sulfate?
a (nh4)2so4
b nh3so4
c nh42so4
d nh4(so4)2

Explanation:

Ammonium sulfate is composed of ammonium ions ($\ce{NH^{+}_{4}}$) and sulfate ions ($\ce{SO^{2-}_{4}}$). To balance the charges, two ammonium ions (each with a +1 charge) are needed for one sulfate ion (with a -2 charge). So the formula is $\ce{(NH4)2SO4}$.

Answer:

A. (NH4)2SO4