To calculate the needed amount of reactant for the reaction, we can use a BCA (Before, Change, After) table. The needed amount of F2 is 306.26 g.
To calculate the needed amount of reactant for the reaction, we can use a BCA (Before, Change, After) table. We are given that there are 1000 g of solid P4 available and 120 g of PF3 is produced. The balanced chemical equation is P4(s) + 6 F2(g) → 4 PF3(g).
Before (mol): 8.07 mol P4, 0 mol F2, 0 mol PF3
Change (mol): -8.07 mol P4, +8.07 mol F2, +32.28 mol PF3
After (mol): 0 mol P4, 8.07 mol F2, 32.28 mol PF3
From the table, we can see that 8.07 mol of F2 is needed. To convert this to grams, we need to multiply by the molar mass of F2, which is 38.00 g/mol. Therefore, the needed amount of F2 is 306.26 g.