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31.08.2021 •
Chemistry
All the substances listed below are fertilizers that contribute nitrogen to the soil. Which of these
is the richest source of nitrogen on a mass percentage basis?
a. Urea, (NH2)2CO
b. Ammonium nitrate, NH4NO3
c. Guanidine, HNC(NH2)2
d. Ammonia, NH3
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Ответ:
C, detritus