How many moles of #H_2# are in #4.48*10^-4# #g# of #H_2#?

1 Answer
Jul 5, 2016

Answer:

Approx. #2xx10^-4*mol#

Explanation:

#"Moles of dihydrogen"# #=# #"Mass"/"Molar mass"#

#=# #(4.48xx10^-4*g)/(2xx1.00794*g*mol^-1)# #=# #??mol#

Note that this is consistent dimensionally. We wanted an answer in moles, and the equation duly gives us an answer in moles.

In terms of hydrogen atoms, how many atoms of hydrogen does this molar quantity represent? Why?