Question

How many moles of phosphorus are in 12.0 grams of phosphorus

Answer 1

0.39 moles

Given:12.0g P
Find: moles of P
*P=30.97 g/mol
Solve: 12.0g P *(1 mol P/ 30.97g P)=0.38747175 mol P
                                                         =0.39 mol P