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podryga [215]
3 years ago
10

I need an answer asap thank you all for your answers! xoxo, anastasia

Chemistry
1 answer:
ICE Princess25 [194]3 years ago
5 0
The answer is b because it could happen to you

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H2O has a mc021-1.jpgHvap = 40.7 kJ/mol. What is the quantity of heat that is released when 27.9 g of H2O condenses?
babymother [125]

Energy released from changing the phase of a substance from the gas phase to liquid phase can be calculated by using the specific latent heat of vaporization. The heat of fusion of water at 0 degrees Celsius is 40.7 kJ/mol. Calculation are as follows:<span> </span>


Energy = 27.9 g (1 mol / 18.02 g) x 40.7 kJ/mol


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3 years ago
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The ksp of pbi2 is 1.4 x 10-8. what is the molar solubility of lead(ii iodide in a solution of 0.400 m sodium iodide?
tino4ka555 [31]
The solubility product of a substance us calculated by the product of the concentration of the dissociated ions in the solution raise to the stoichiometric coefficient of the ions. Therefore, we need the dissociation reaction. For this, it will have the reaction:

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Ksp = [Pb2+][I-]^2 = <span>1.4 x 10-8
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The molar solubility would be </span>1.5x10^-3 M.
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vitfil [10]
Looking at the following answers, and considering the definition of a biological community I believe the answer is D.
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What are the products of the following equation?
Artyom0805 [142]
The products are on the right side of the equation. For this one it would be 2AlPO4 + 3CaSO4
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When a substance changes from one phase to another, which of the following occurs?
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Answer:

B

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The average kinetic energy of the Substance changes.

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