Determine the mass p2o5 formed by the interaction of o2 and 6.2 g of phosphorus. Determine the mass fraction of k2so4.

m (P) = 6.2 g.
Let us determine the mass of phosphorus oxide obtained as a result of the reaction.
We write down the equation of reactions.
4P + 5O2 = 2P2O5.
Further, according to the reaction equation, we find the mass of phosphorus oxide. First, we calculate the molar mass of phosphorus and phosphorus oxide. We write down the solution.
M (P) = 31 g / mol.
M (P2O5) = 2 * 31 + 16 * 5 = 62 + 80 = 142 g / mol.
Next, we find the mass of phosphorus oxide.
6.2 g phosphorus – x g phosphorus oxide
31 * 4 g / mol phosphorus – 2 * 142 g / mol phosphorus oxide
X = 6.2 * 2 * 142: (31 * 4) = 14.2 g.
Answer: the mass of phosphorus oxide is 14.2 grams.