Question

Doctors recommend that men get 11 g of zinc daily. How many moles of zinc are in 11 g
a)0.17
b)17
c)1.70
d).20

Answer 1

1 mole of Zn = 65.4 g
11 g Zn = 11 g /65.4 g moles
= 0.1682 moles

Answer 2

\[n= \frac{ m }{ M }\] where m is the mass and M is the molar mass, which can be found for zinc in the periodic table.