A nitrogen oxide is 63.65% by mass nitrogen. The molecular formula could be . A nitrogen oxide is 63.65% by mass nitrogen. The molecular formula could be . N2O N2O4 NO NO2 either NO2or N2O4

Cr(oh)3 -> cr(3+) + 3oh-

If a hydrogen atom is neutral, it must also have  one electron. an oxygen atom (o) has an atomic number of eight (8). this means a neutral oxygen atom has eight protons and eight electrons. the element actium (ac) has an atomic number of 89, so it has 89 protons and 89 electrons in a neutral atom

D. h2o + h2o > h3o + oh- confirmed.