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Leno4ka [110]
3 years ago
6

Calculate the heat energy released when 21.1 g of liquid mercury at 25.00 °C is converted to solid mercury at its melting point.

Chemistry
1 answer:
PSYCHO15rus [73]3 years ago
3 0
Heat capacity yea urjjrjrjrbdnsnnend
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Codeine C18H21NO3 is a weak organic base. A 5.0 x 10^-3 M solution of codeine has a pH of 9.95. Calculate the value of Kb for th
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Kb = 4.45\times10^{-7}\ mol/L

p^{Kb}=6.35

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For a weak organic base, the formula to find p^{OH} is given by:

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Here c= 5\times10^{-3}\ M

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Substituting the above values in the formula,we get:

p^{k_b}=p^{OH}-\log c\\p^{k_b}=4.05-\log (5\times10^{-3})\\p^{K_b}=6.35\\K_b=$antilog 6.35=4.45\times10^{-7}\ mol/L

Hence:

Kb = 4.45\times10^{-7}\ mol/L

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