No, that is just two particles of water. One particle of water has two particles of Hydrogen (and one Oxygen). What you described has 4 particles of hydrogen.
Another name for hydrogen is H and for oxygen is O.
No. Hydrogen gas is H2. H2O is water.
dihydrogen oxide You can also call it hydrogen hydroxide.
water or hydrogen oxide
dihydrogen oxide You can also call it hydrogen hydroxide.
2 hydrogen, one oxygen oxygen and hydrogen (2) Henceforth, H2O.
Another answer on here suggested 11.19%; However I would suggest 66% when using H2O, this shows 2 parts hydrogen (66%) and 1 part oxygen (33%)
The formula for hydrogen hydroxide is H2O.
There are two atoms of hydrogen in one molecule of H2O.
dihydrogen oxide You can also call it hydrogen hydroxide.
No. Hydrogen is H (14 g/mol) and Water is H2O (14x2+16 so 44 g/mol).
No, you would need energy to combine hydrogen and oxygen into H2O