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Cravcencoradu05
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Calculeaza masa oxidului de cupru ce poate reactiona cu acidul azoticcu masa de 12.6 g

Răspuns :

Pokju8888
       X        12,6g                                                         MCuO=64+16=80
       CuO +2HNO3=Cu(NO3)2 + H2O
       80     2.63                                                               MHNO3=1+14+3.18
                                                                                                  =63
x=80.12,6:2.63=16g CuO