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ehidna [41]
2 years ago
14

Calculate how many moles of carbon dioxide are contained in 5.57 x 10²¹ molecules of CO₂

Chemistry
1 answer:
Alex777 [14]2 years ago
3 0
<h2>Answer:  0.00925 mol </h2>

Explanation:

Moles = # of molecules ÷ Avogadro's Number  

         =  (5.57 × 10²¹ molecules) ÷ (6.022 × 10²³ molecules/mol)  

         =  0.00925 mol

<h3>∴ the 5.57 x 10²¹ molecules of carbon dioxide ≡ 0.00925 mol</h3>
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Determine the [H3O+] in a 0.265 M HClO solution. The Ka of HClO is 2.9 × 10-8.
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8.8 × 10-5 M is the  [H3O+] concentration in 0.265 M HClO solution.

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the equation of dissociation can be written and ice table to be formed.

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I  0.265                0        0

C  -x                    +x     +x

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x = 8.8 × 10-5 M

The hydronium ion concentration is 8.8 × 10-5 M  in 0.265 M solution of HClO.

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