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The volume of 2.33 moles of water (H2O) vapor at STP is:

Variables,control,conclusion and finally scientific theory

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

The correct answer is "atomic weight".