Hi !
Calculate the number of oxygen atom in 8.4 g of sodium bicarbonate.
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Answers
Answered by
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Hi there !
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Given :
Sodium bicarbonate
It's chemical formula is NaHCO3
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Molecules mass of NaHCO3 is
Na -- 1 × 23 = 23
H -- 1 × 1 = 1
C -- 1 × 12 = 12
O -- 3 × 16 = 48
Adding all these ( 23 + 1 + 12 + 48 )
=> NaHCO3 = 84 g
Now, 84 g of NaHCO3 contains 1 mole.
That means ;
84 g of NaHCO3 = 1 mole.
1 g of NaHCO3 = 1 / 84 mole
8.4 g of NaHCO3 = 1 / 84 × 8.4
=> 0.1 mole.
Now,
1 mole of NaHCO3 = 3 mole of oxygen atom.
0.1 mole of NaHCO3 = 3 × 0.1 mole of oxygen atom.
0.1 mole of NaHCO3 = 0.3 mole of oxygen atom.
Therefore,
No. of oxygen atom
=> 0.3 × 6.023 × 10²³
∴ 1.8069 × 10²³ [Ans]
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Thanks for the question !
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jasleenkaur94:
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