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2 years ago

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The temperature of the areas surrounding Farmington before Storm 1 and before Storm 2 was about 8°C, and there was the same amou

nt of water vapor in the air. Storm 1 had more rainfall than Storm 2.

1 answer:

densk [106]2 years ago

4 0

Storm two because it’s 8•C

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Prisms separate ________ light, such as that from the Sun, by wavelength. Which best completes the statement? ultraviolet white

tatuchka [14]

Answer:

The answer is B white

Explanation:

hope it helps :)

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2 years ago

Estimate the increase in the molar entropy of O2(g) when the temperature is increased at constant pressure from 298 K to 348 K,

Tamiku [17]

Explanation:

It is known that relation between entropy, heat energy and temperature is as follows.

dS = $\frac{Q}{T}$

$\int dS = \int \frac{Q}{T}$

Also we know that at constant pressure, Q = $\Delta H = C_{p} - dT$

$\int_{S_{1}}^{S_{2}} dS = \int_{T_{1}}^{T_{2}} C_{p} \frac{dT}{T}$

$\Delta S = C_{p} \int_{T_{1}}^{T_{2}} \frac{dT}{T}$

As the given data is as follows.

$T_{1}$ = 298 K, $T_{2}$ = 348 K

$C_{p}$ = 29.355 J/K mol

Now, putting the given values into the above formula as follows.

$\Delta S = C_{p} ln {T_{1}}^{T_{2}} \frac{dT}{T}$

= $29.355 [ln (348) - ln (298)]$

= $29.355 [5.85 - 5.69]$

= 4.48 J/k mol

Thus, we can conclude that the increase in the molar entropy of given oxygen gas is 4.48 J/k mol.

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2 years ago

Was Democritus' atomic theory correct?

Elza [17]

Answer:

Yes, Democritus's atomic theory was correct.

Explanation:

He thought the first part of his theory states that all matter is made of atoms, which are indivisible. The second part of the theory says all atoms of a given element are identical in mass and properties. The other scientists added onto his theory to show that he was correct, except Aristotle, he thought the world was made of the 4 elements: earth, wind, fire, water.

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2 years ago

Two students are working together to build two models. Both models will represent the molecular structure of sodium bicarbonate,

otez555 [7]

Answer:

Each student will need;

1 red jelly bean, 1 white jelly bean, 1 black jelly bean and 3 red jelly beans.

Explanation:

Sodium bicarbonate molecule, NaHCO3, or baking soda is composed of the following:

1 atom of sodium, Na;

1 atom of hydrogen, H;

1 atom of carbon, C, and

3 atoms of oxygen.

For each of the models to be built by the two students, these atoms are to be represented accordingly.

Since Red jelly beans represent sodium atoms (Na), white jelly beans represent hydrogen atoms (H), black jelly beans represent carbon atoms (C), and blue jelly beans represent oxygen atoms (O), each student will need;

1 red jelly bean, 1 white jelly bean, 1 black jelly bean and 3 red jelly beans.

A sample model is found in the attachment below:

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2 years ago

When the reaction mixture is worked-up, it is first washed three times with 5% sodium bicarbonate, and then with a saturated nac

Ann [662]

Solution:

After the reaction of mixture is worked-up Washing three times the organic with sodium carbonate helps to decrease the solubility of the organic layer into the aqueous layer. This allows the organic layer to be separated more easily.

And then the reaction washed by saturated NACL we have The bulk of the water can often be removed by shaking or "washing" the organic layer with saturated aqueous sodium chloride (otherwise known as brine). The salt water works to pull the water from the organic layer to the water layer.

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2 years ago