please help ! )))) How many mol orthophosphate acids can be obtained from 6.2 grams of phosphorus?

Дано:m (P) = 6,2гn (H3PO4) - ?2P ⠀ + ⠀ 8H2O = 2H3PO4 + 5H2n=2моль⠀ ⠀ ⠀ ⠀ n=2мольM=31г/моль⠀ ⠀ ⠀М=98г/моль1) n (P) = 6,2/31 = 0,2 моль2) n (H3PO4) = n (P) = 0,2 мольОтвет: 0,2моль©OAR