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Calculate the number of P atoms in 2.63 g of phosphorus pentabromide (PBr5)Calculate the mass in grams of Br 3.28 x 1021 molecules of PBr5

Calculate the number of P atoms in 2.63 g of phosphorus pentabromide (PBr₅)
Calculate the mass in grams of Br 3.28 x 10²¹ molecules of PBr₅