No it is not.
1 mole HgO = 216.59g HgO = 6.022 x 1023 molecules HgO 64.0g HgO x (1mol HgO/216.59g HgO) x (6.022 x 1023 molecules HgO/mol HgO) = 1.78 x 1023 molecules HgO
HgO has valency 2 .so,the roman numeral for HgO is: HgO(II)
HgO is silver in colour as it is called silver mirror
To answer you question HgBr2 is soluble in water. I had the same question so I surfed around a bit and found the answer on a chemistry based website talking about solublity and net ionic equations. Hope this helps~
HgO
HgO
HgO
HgO
HgO
HgO
HgO
The country code and area code of Pachuca- Hgo., Mexico is 52, (01)771.