'A single molecule of H2O' vs 'a single atom of H2O'

In summary, a single molecule of H2O is the correct term as H2O is a molecule composed of 2 Hydrogen atoms and 1 Oxygen atom. The mass of 1 H2O molecule can be calculated using the molar mass of 18.02 g/mol or by dividing 18 g/mol by Avogadro's number of 6.023 x 10^23 molecules/mol, which results in a mass of 2.992 x 10^-23 grams. It is important to pay attention to the units when calculating and reporting the mass of a molecule.
  • #36
DrClaude said:
What is "one proton of H atom"?

The mass of the hydrogen atom is the mass of the entire atom, namely the proton, the electron, and the mass equivalent to the binding energy (a hydrogen atom weighs less than the sum of the mass of a lone proton and a lone electron).
Then which one I use for the mass of one H atom 1.1.67353×10-24 g or 2 1.6726219 × 10-24 g. Could you suggest me?
 
Chemistry news on Phys.org
  • #37
Indranil said:
Then which one I use for the mass of one H atom 1.1.67353×10-24 g or 2 1.6726219 × 10-24 g. Could you suggest me?
I said it already. The mass of one hydrogen atom, made up of 1 proton and 1 electron, is 1.1.67353×10-24 g.
DrClaude said:
The mass of the most common isotope of hydrogen, 1H, is actually 1.007 825 032 23 g/mol, or 1.67353×10-24 g for one atom.
 
  • Like
Likes Indranil
  • #38
DrClaude said:
I said it already. The mass of one hydrogen atom, made up of 1 proton and 1 electron, is 1.1.67353×10-24 g.
Thank you all
 
  • Like
Likes HAYAO
  • #39
Indranil said:
Thank you all
This sounds like a good place to close out the thread. Thank you to all who have tried to help @Indranil
 
  • Like
Likes symbolipoint and HAYAO
Back
Top