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4 years ago

What happens a to the energy that is lost when water freezes

Chemistry

1 answer:

Marianna [84]4 years ago

5 0

The energy that is lost becomes free energy.

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The viewing of a solar eclipse involves a specific relationship between the earth, the sun, and the moon. Which of these represe

kirza4 [7]

Answer: B) sun - earth - moon

Explanation:

in the solar system you see them in this order as the sun is in the middle it comes first then earth and shortly after the moon.

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4 years ago

Dinitrogentetraoxide partially decomposes into nitrogen dioxide. A 1.00-L flask is charged with 0.0400 mol of N2O4. At equilibri

artcher [175]

Answer:

Keq=0.866

Explanation:

Hello,

In this case, the undergone chemical reaction is:

$N_2O_42NO_2$

In such a way, since 0.0055 mol of N₂O₄ remains in the flask, one infers that the reacted amount ( $x$ ) was:

$x=0.04mol-0.0055mol=0.0345mol$

In addition, the produced amount of NO₂ is:

$2*0.0345mol=0.069mol$

Finally, considering the flask's volume, the equilibrium constant is then computed as follows:

$Keq=\frac{(2*0.0345M)^2}{0.0055M}=0.866$

Best regards.

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3 years ago

Adolfo drank some red punch and grimaced at the flavor. His little brother had made the pitcher of punch with too much sugar. Wh

drek231 [11]

I believe that the saliva interacting with sugar molecules is what allowed Adolfo’s brain to register the extra-sugary flavor of the punch

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3 years ago

"you have a mixture made os two substances, one with a higher density than the other. how could you separate the substances in t

shtirl [24]

The correct answer is <span>D) centrifuge the mixture because the substance with the highter density will be pulled to the bottom

When things spin around, like a centrifuge, the centripetal force draws things towards the middle. If you make it a bit like a spiral and put it sideways, then the denser thing will go to the bottom while the less dense ones will remain on the outside. </span>

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4 years ago

Read 2 more answers

A topaz crystal has an interplanar spacing (d) of 1.36 Å (1 Å =1×10^[−10] m). Calculate the wavelength of the X-ray that should

bija089 [108]

Answer:

7.0*10-11m or 70Å

Explanation:

From Bragg's equation, w=2dsinx/n

Since all the parameters are specified in the question, we can easily go ahead to obtain the wavelength but we must convert the spacing given in angstroms to meters using the conversion factor provided as shown in the solution below:

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4 years ago