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3 years ago

12

Explain why material within the mantle moves in convection cells. In your explanation you should describe the relationship betwe

en temperature, particle motion, and density.

1 answer:

Murrr4er [49]3 years ago

7 0

Answer:

I do not know the Answer I'm just trying to get my point

Explanation:

Thank you

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Can you explain why the elements on the right hand side of the periodic table receive electrons instead of giving them up?

aleksandrvk [35]

Due to the Octet Rule ...

Elements on the right side of the Periodic Table gain electrons in order to get the 8 valence electrons and form negative ions.

And elements on the left side of the Periodic Table lose electrons in order and form positive ions.

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3 years ago

When 240 mg of a certain molecular compound X are dissolved in 35.0 g of dibenzyl ether ((C6H5CH2)2O), the freezing point of the

DedPeter [7]

Answer: MM = 16.55 g/mol

Explanation: <u>Freezing</u> <u>point</u> <u>depression</u> is a phenomena that explains why adding a solute to a solvent decreases the solvent freezing point: when a substance begins to freeze, its molecules slows down and rearrange itself forming a solid. If a solute is added, the molecules from the solvent interfere in the formation of the solid. To guarantee the transformation, the solution has to cooled down even more.

Freezing point and molality concentration is related by

$\Delta T=T_{f}_{(solvent)}-T_{f}_{(solution)}=K_{f}.m$

where

ΔT is freezing point depression

$T_{f}_{(solvent)}$ and $T_{f}_{(solution)}$ are freezing point of solvent and solution, respectively

$K_{f}$ is freezing point depression constant

m is molality concentration

<u />

Dibenzyl ether is the solvent and has the following properties: $K_{f}=$ 6.27 and $T_{f}$ = 3.6°C.

Molality concentration is

$m=\frac{T_{(solvent)}-T_{(solution)}}{K_{f}}$

$m=\frac{3.6-1}{6.27}$

m = 0.415

<u>Molality</u> <u>concentration</u> is moles (n) of solute dissolved in a mass, in kilogram, of solvent.

$m=\frac{moles}{mass(kg)}$

n = m(mass of solvent in kg)

n = 0.415(0.035)

n = 0.0145

<u>Molar</u> <u>mass</u> (M) is the weight of one sample mole and can be calculated as

$n=\frac{m}{M}$

M = $\frac{m}{n}$

m in grams

Molar mass of compound X is

$M=\frac{0.24}{0.0145}$

M = 16.55

<u>Molar mass of molecular</u><u> compound X is 16.55g/mol</u>

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3 years ago

HELP ASAP WILL GIVE BRAINIEST IF CORRECT a a a²+ b2 = c² ? What is the main benefit of this model? O A. It helps make prediction

vladimir1956 [14]

The answer is C, it’s a pattern that we can see and use on all right triangles.

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2 years ago

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bonufazy [111]

Answer:

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