Answer:
244 moles of phosphorus are present in 61.0 moles of 
.
Step-by-step explanation:
Moles of 
 = 61.0 moles
1 mol of 
 contains 4 moles of phosphorus.
Then 61.0 moles of 
 will contain:
 of phosphorus
244 moles of phosphorus are present in 61.0 moles of 
.