9. The equation 2 N O 2 in equilibrium with N 2 O 4 represents a system, that does not change that goes to completion in chemical equilibrium in physical equilibrium

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

Man i dont know this answer

Bthats what im doing to and i figured it out it is b

As cooking food that has to go in the oven