Elemental phosphorus reacts with chlorine gas according to the equation:

P

4

(s)+6Cl

2

(g)→4PCl

3

(l)

A reaction mixture initially contains 45.63 g

 P

4

 and 131.9 g

 Cl

2

.

Part A

Once the reaction has occurred as completely as possible, what mass (in g

) of the excess reactant remains?

Express your answer to three significant figures