How many total atoms are in 0.260 g of p2o5?

0.006 ×10²³  atoms

Explanation:

Given data:

Mass of P₂O₅ = 0.260 g

Number of atoms = ?

Solution:

To solve this problem we will  use the Avogadro numbers.

The number 6.022×10²³ is called Avogadro number and it is the number of atoms, ions or molecules in one mole of substance.  According to this,

1.008 g of hydrogen = 1 mole =  6.022×10²³  atoms.

18 g water = 1 mole = 6.022×10²³ molecules

Thus,

283.88 g of P₂O₅ = 1 mole = 6.022×10²³  atoms.

For 0.260 g:

0.260 g/ 283.88 g/mol =0.00092 mol

0.00092 × 6.022×10²³  atoms = 0.006 ×10²³  atoms

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