What is the mass in grams of 7.20 mol of antimony?

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Answer 1 · 2016-02-04T21:51:10

#1# #mol# of antimony has a mass of #121.76#. If there are #7.20# mol, then...........?

#Sb# has an atomic mass of #121.76# #g*mol^-1#.

If there are #7# #"moles"#, then #7# #cancel("mol")# #xx# #121.76# #g*cancel(mol^-1)##=# #??# #mol#.

Answer 2 · 2016-02-04T21:51:48

#876.6g#

From the periodic table, the molar mass of Sb is #121.75g//mol#.

Since #n=m/(M_r)#, we can conclude that

#m=nxxM_r#

#=7.20xx121.75#

#=876.6g#