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3 years ago

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On the basis of the solubility curves shown above, the greatest percentage of which compound can be recovered by cooling a satur

ated solution of that compound from 90°C to 30°C? A) KCl B) NaNO3 C) NaCl D) KNO3

2 answers:

lys-0071 [83]3 years ago

6 0

The answer is D) KNO3

Nookie1986 [14]3 years ago

6 0

The answer is D) <span> <span> KNO3 </span> </span>

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What happens to the ph of the reaction mixture as the oxidation reaction proceeds in an oxidation of an aromatic side chain?

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Answer:

The pH decreases.

Explanation:

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3 years ago

The pre-exponential constant and activation energy for the diffusion of iron in cobalt are 1.7 x 10-5 m2/s and 273,300 J/mol, re

Kitty [74]

<u>Answer:</u> The temperature of the system will be 1622 K

<u>Explanation:</u>

The equation relating the pre-exponential factor and activation energy follows:

$\log D=\log D_o-\frac{E_a}{2.303RT}$

where,

D = diffusion coefficient = $2.7\times 10^{-14}m^2/s$

$D_o$ = pre-exponential constant = $1.7\times 10^{-5}m^2/s$

$E_a$ = activation energy of iron in cobalt = 273,300 J/mol

R = Gas constant = 8.314 J/mol.K

T = temperature = ?

Putting values in above equation, we get:

$\log (2.7\times 10^{-14})=\log (1.7\times 10^{-5})-\frac{273,300}{2.303\times 8.314\times T}\\\\T=1622K$

Hence, the temperature of the system will be 1622 K

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2 years ago