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Ilya [14]
3 years ago
15

When water vapor (a gas) starts to

Chemistry
1 answer:
lisabon 2012 [21]3 years ago
8 0
Idek I just need free points so I can use this app for free
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Mallebility, I got it right on the unit test.

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You have 500 mL of 5 M HCl already made. You need to dilute the solution to 1 M HCl. How much water will you need to add?
hram777 [196]

Answer:

You need to add 400mL of water

Explanation:

500mL = 5 M HCI     That means that if you divide both sides by 5

100mL = 1 M HCI         If you need ot get rid of 4 M HCI then you add 400 mL of water because that is what it is equal to

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3 years ago
As a gas changes to a solid, energy<br> A. is not used.<br> B. is released.<br> C. is absorbed.
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B

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Energy is released, when a gas changes to solid

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3 years ago
What is the function of the pistil and stamen of a plant?
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2 years ago
Hydrogen gas and fluorine gas will react to form hydrogen fluoride gas. What is the standard free energy change for this reactio
Marta_Voda [28]

Answer:

\Delta G=-541.4kJ/mol

Explanation:

Hello there!

In this case, according to the given information, it turns out firstly necessary to write out the described chemical reaction as shown below:

H_2+F_2\rightarrow 2HF

Now, we set up the expression for the calculation of the standard free energy change, considering the free energy of formation of each species, specially those of H2 and F2 which are both 0 because they are pure elements:

\Delta G=2\Delta G_f^{HF}-(\Delta G_f^{H_2}+\Delta G_f^{F_2})\\\\\Delta G=2*-270.70kJ/mol-(0kJ/mol+0kJ/mol)\\\\\Delta G=-541.4kJ/mol

Regards!

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2 years ago
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