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vladimir1956 [14]
3 years ago
10

What is the pH of 40.0 mL of a solution that is 0.15 M in CN� and 0.29 M in HCN? For HCN, use Ka = 4.9 * 10^-9

Chemistry
1 answer:
artcher [175]3 years ago
4 0
This is a buffer solution because it consists of a weak acid (HCN) and its conjugate base (CN-)
Since it's a buffer solution, the pH is equal to the pKa of the solution, you would use the henderson-hasslebach equation:
pH = pKa - log([acid]/[base])
pH = -log(4.9*10-9) - log(.29/.15)
pH = about 8
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What force is causing The object to eventually stop moving
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Hey buddy, here is your answer. Hope it helps you.

Explanation:

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Calculate the approximate number of atoms in a bacterium, assuming the average mass of an atom is ten times the mass of a hydrog
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Answer: -

The approximate number of atoms in a bacterium is 10¹¹

Explanation: -

We are given the mass of a bacterium is 10⁻¹⁵ kg.

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Mass of an atom of bacterium = 10 x mass of hydrogen atom

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8 0
3 years ago
Multiplication & Division
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6 0
3 years ago
Read 2 more answers
Volume of 8.29ml and a mass of 16.31g
strojnjashka [21]
Density = mass/volume = 16.31/8.29 = 1.96 g/mL.

Hope this helps!
3 0
3 years ago
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