Hg22+ + NO3- -----> Hg2(NO3)2
HgNO3: mercurous nitrate is the earlier name for mercury (I) nitrate.
The compound name for mercury nitrate is mercurous nitrate or mercury(I) nitrate, with the chemical formula HgNO3.
Mercury could be reacted with Nitric acid to form Mercurous nitrate. Since hydrogen is less reactive than mercury, therefore mercury would not replace hydrogen from nitric acid but the nitrate ion could oxidize mercury ion and form mercurous chloride .
Essentially ALL the metallic nitrates are soluble, even mercurous nitrate, perhaps the only mercurous salt that is soluble.
Mercurous nitrate or mercury (I) nitrate, assuming that the formula given was the best approximation available to the questioner for Hg2(NO3)2.
The chemical formula for mercurous sulfide is Hg2S.
The formula for Mercurous Bromide is Hg2Br2.
The chemical formula for Mercurous Fluoride is Hg2F2.
The chemical formula for the mercurous ion is Hg2^2+.
The chemical formula of mercurous carbonate is Hg2CO3.
Hg3PO4 is the chemical formula for mercurous phosphate.
The formula of Mercurous Chlorite is Hg2(ClO2)2.