Photos NA 2 O

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Na 2 o. N2-n2o-n2o5-hno3. Hno3+h2o2. Cao+hno3. H2 o2 h2o.
N2-n2o-n2o5-hno3. Hno3+h2o2. Cao+hno3. H2 o2 h2o.