a 22.5g sample of (NH4)2CO3 (ammonium carbonate) contains_____ moles of ammonium ions.

A. o.468
b. 0.288
C. 0.234
d. 2.14
e. 3.47

1 answer

moles (NH4)2CO3 = grams/molar mass.
Then moles NH4^+ will be twice that since there are two NH4^+ ions in one molecule of (NH4)2CO3.