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Brilliant_brown [7]
3 years ago
15

Name three stars that are hotter than the sun

Chemistry
1 answer:
devlian [24]3 years ago
7 0

Eta Carinae could be as large as 180 times the radius of the Sun, and its surface temperature is 36,000-40,000 Kelvin. Just for comparison, 40,000 Kelvin is about 72,000 degrees F. So it's the blue hypergiants, like Eta Carinae, which are probably the hottest stars in the Universe.

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A 0.15 m solution of chloroacetic acid has a ph of 1.86. What is the value of ka for this acid?
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ClCH_2COOH\rightarrow ClCH_2COO^-+H^+

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So dissociation constant will be:

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K_a = ?

Putting in the values we get:

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1.86=-log[H^+]

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\alpha=0.06

As [H^+]=[ClCH_2COO^-]=0.01

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K_a=1.67\times 10^{-3]

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