How many moles of chlorine gas are associated with a #45*g# mass of the element?

1 Answer
anor277
Sep 20, 2016

A bit over a #1/2# mole of #Cl_2# gas.

Explanation:

All (well most) elemental gases are binuclear: i.e. #O_2#, #N_2#, #H_2#, #F_2#. The exceptions are the Noble Gases, which are unimolecular. In any case all the halogens (gas, liquid, and solid) are bimolecular, i.e. #X_2#.

#"Moles of stuff"# #=# #"Mass of stuff"/"Molar mass of stuff"# #=# #(45.12*cancelg)/(70.9*cancelg*mol^-1)#

#=# #>0.6*mol# #Cl_2# gas.

Note that you simply have to know that chlorine, and fluorine gases, and liquid bromine and solid iodine are BIMOLECULAR.

Related questions
See all questions in The Mole
Impact of this question
4094 views around the world
You can reuse this answer
Creative Commons License