What's different about the valence electrons of Carbon and Silicon?
1 answer:
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Answer:
7.951 x 0²³atoms
Explanation:
Mass of Fe₃O₄ = 140g
Solution:
To find the number of oxygen atoms in iron(III) oxide, we first find the number of moles in the compound:
Number of moles =
Molar mass of Fe₃O₄ = (3x56) + (4x64) = 168 + 256 =424g/mol
Number of moles = = 0.33mole
1 mole of an atom contains 6.02 x 10²³atoms
∴number of oxygen atoms in Fe₃O₄ = 4 x 0.33 x 6.02 x 10²³atoms
= 7.951 x 0²³atoms