How do you calculate the mass of one mole of such hydrogen giving your answer to atoms four decimal places? (The Avogadro constant, L= #6.0225 xx 10^23 mol^-1#)?

1 Answer
anor277
Jan 7, 2017

#"Mass of 1 mole of hydrogen atoms"# #=# #"Mass of 1 hydrogen atom"xx"N"_A#, where #"N"_A=L=6.0225xx10^23*mol^-1#.

Explanation:

#"Mass of 1 hydrogen atom"# #=# #1.6727xx10^{-27}*"kg"# (from this site).

And thus, #"mass of 1 mole of hydrogen atoms"# #=#

#1.6727xx10^(-27)*"kg"xx6.0225xx10^23*mol^-1xx10^(3)*"g"*kg^-1#

#=1.007*"g"*"mol"^-1#

Clearly, you would not be expected to know these masses. You would be expected to be able to do such a calculation if provided with the masses of the nucleon, and with #"Avogadro's number"#.

What is the mass of one mole of hydrogen molecules?

Related questions
See all questions in The Mole
Impact of this question
29582 views around the world
You can reuse this answer
Creative Commons License