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
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