Which quantity contains the LEAST number of atoms?

Question

#a.# #"Two moles of NaOH;"#

#b.# #"One mole of ammonia; "#

#c.# #"Two moles of calcium chloride; "#

#d.# #"One mole of alumina. "#

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Answer 1 · 2017-08-02T09:07:01

I would go for #"option b"#.

You gots.......

#a.# #"Two moles of NaOH;"# #2xxNa^+ + 2HO^-# #"moles"#

#b.# #"One mole of ammonium; "# #1xxNH_3*mol#

#c.# #"Two moles of calcium chloride; "# #2xxCa^(2+)+4xxCl^(-)*mol#

#d.# #"One mole of alumina; "# #2xxAl^(3+)+3xxO^(2-)*mol#

Is this clear?