In the equation below, how many molecules of Cl2 are required to react completely with 2 atoms of sodium? 2 Na(s) + Cl2(g) ---> 2 NaCl(s)

Select one:
a. 1
b. 2
c. 3
d. 4

c

Explanation:

a. 1

Explanation:

2Na + Cl2 ---> 2NaCl

Only one molecule of Cl2 is required to react.
Remember the concept, the little number, or the subscript represents the number of atoms in a molecule. The coefficient or the big number before a molecule represents the number of molecules. There is no coefficient in the reaction before Cl2 therefore only 1 molecule is needed to completely react with 2 atoms of sodium.

93.2 ml + 3920 ml = 4013 ml total  

(93.2 ml) * (2.03 m) / (4013 ml) = 0.0471 m

the volume in in l of the diluted solution would be 0.0471 m.