How many total atoms are in 0.900 g of P2O5?

Expert Solution

P2O5 molar mass = 142 g /mol

P2O5 mass = 0.900 g

P2O5 moles = 0.900 / 142

= 6.34 x 10^-3

1 mole ----------------------> 6.023 x 10^23molecules

6.34 x 10^-3 moles --------------> 6.34 x 10^-3 x 6.023 x 10^23molecules

---------------> 3.82 x 10^21 molecules

0.9 P2O5 contain -----------------> 3.82 x 10^21 molecules

-----------------> 7 x 3.82 x 10^21 atoms

-----------------> 2.67 x 10^22 atoms

queen_honey_blossom answered 2 weeks ago

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