n(<span>Сa(NO3)2)=m(<span>Сa(NO3)2)/M(<span>Сa(NO3)2)</span></span></span>
<span><span><span>n(Сa(NO3)2)=82г/164г/моль=0,5моль</span></span></span>
<span><span><span>n(<span>P2O5</span>)=m(<span>P2O5</span>)/M(<span>P2O5</span>)</span></span></span>
<span><span><span>n(<span>P2O5)=71г/142г/моль=0,5моль</span></span></span></span>
<span><span><span><span>Ответ:n(Сa(NO3)2)=n(P2O5)</span></span></span></span>
<span><span><span><span>Выбираем лучшее решение</span></span></span></span>