Answer
a. $ P_4O_6 $ : 219.88 g/mol
b.$ Ca_3P_2O_8 $ : 310.18 g/mol
c.$ Na_2HPO_4 $ : 141.96 g/mol
Work Step by Step
a.
- 4 yellow spheres: 4 phosphorus atoms.
- 6 red spheres: 6 oxygen atoms.
$ P_4O_6 $ : ( 16.00 $\times$ 6 )+ ( 30.97 $\times$ 4 )= 219.88 g/mol
b.$ Ca_3P_2O_8 $ : ( 40.08 $\times$ 3 )+ ( 16.00 $\times$ 8 )+ ( 30.97 $\times$ 2 )= 310.18 g/mol
c.$ Na_2HPO_4 $ : ( 22.99 $\times$ 2 )+ ( 1.008 $\times$ 1 )+ ( 16.00 $\times$ 4 )+ ( 30.97 $\times$ 1 )= 141.96 g/mol
