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

2 Answers
Feb 4, 2016

Answer:

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

Explanation:

#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#.

Feb 4, 2016

Answer:

#876.6g#

Explanation:

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#