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How many total atoms are in 0.610 g of P2O5?

Question

How many total atoms are in 0.610 g of P2O5?

check_circleAnswer
Step 1

Given,

Mass of P2O5 = 0.610 g

Moles of P2O5 can be calculated as:

Molar mass of P2O5 = (2x31)(5x16) 142 g/mol
Mass
0.610 g
4.3 x 103 mol
Moles
Molar mass
142 g/mol
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Molar mass of P2O5 = (2x31)(5x16) 142 g/mol Mass 0.610 g 4.3 x 103 mol Moles Molar mass 142 g/mol

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Step 2

Number of atoms in 4.3 × 10-3 mo...

6.022 x 1023 atoms
1 mol contains
6.022 x 1023 atoms
10-3 mol
10-3 mol contains
x 4.3 x
.. 4.3 x
1 mol
= 2.6 x 1021 atoms
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6.022 x 1023 atoms 1 mol contains 6.022 x 1023 atoms 10-3 mol 10-3 mol contains x 4.3 x .. 4.3 x 1 mol = 2.6 x 1021 atoms

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