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Vesnalui [34]
3 years ago
5

How many grams of NaCl can be dissolved in 100 grams of water at 70°C? What is its concentration? (20 pts.)

Chemistry
2 answers:
marin [14]3 years ago
6 0
70 g at 20 C is the correct answer
hoa [83]3 years ago
5 0

Answer:

70 g NaCl at 20 °C Supersaturated.

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Which of the following is a nonrenewable energy source? A. coal B. solar C. wind D. hydropower E. burning biomass
VARVARA [1.3K]
The best answer among the following choices would be A) since the other options are NOT nonrenewable energy sources.
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3 years ago
An unknown triprotic acid (H3A) is titrated with NaOH. After the titration Ka1 is determined to be 0.0013 and Ka2 is determined
e-lub [12.9K]

Answer:

6.68 X 10^-11

Explanation:

From the second Ka, you can calculate pKa = -log (Ka2) = 6.187

The pH at the second equivalence point (8.181) will be the average of pKa2  and pKa3. So,

8.181 = (6.187 + pKa3) / 2

Solving gives pKa3 = 10.175, and Ka3 = 10^-pKa3 = 6.68 X 10^-11

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What do dinking objects have in common
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They all have densities greater than the density of the fluid in which they are<span>sinking. The mass of the displaced liquid is less than the mass of the sinking body.</span>
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3 years ago
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Alona [7]
14. C
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3 0
3 years ago
Explain why the standard enthalpy of formation () for Cl2 (g) is zero, but its standard entropy is larger than zero.
Galina-37 [17]

The standard enthalpy of formation for chlorine is zero but the standard entropy is larger than 0 because it is the elemental state of chlorine.

The standard enthalpy of formation for chlorine is zero because cl2 is the elemental state of chlorine and it does not require any energy for the formation of the standard state of chlorine.

The entropy of any system cannot be negative. It can only be positive or zero.

The entropy of a system will become zero only at a absolute zero temperature.

That's why the entropy of chlorine in elemental state is more than zero because absolutely zero temperature can't be obtained.

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7 0
1 year ago
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