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sammy [17]
3 years ago
9

Which statement is part of the kinetic molecular theory?

Chemistry
1 answer:
Goryan [66]3 years ago
7 0

Answer:

Explanation:

B

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Iron has a mass of 7.87 g per cubic centimeter of volume, and the mass of an iron atom is 9.27 × 10-26 kg. If you simplify and t
Talja [164]
<span>(a) what is the average volume (in cubic meters) required for each iron atom
For this case, the density of Iron would be </span>7.87g/cm³
<span>
V = 9.27 x 10^-26 kg / </span>7.87g/cm<span>³ ( 1 kg / 1000 g)
</span>V = 1.18 x 10-23 cm³<span>

(b) what is the distance (in meters) between the centers of adjacent atoms?
We assume the atoms as cube, so we use the volume of the cube to calculate the distance of the atoms.

V = </span>1.18 x 10-23 cm<span>³ = s</span>³
s = 2.28 x 10^-8 cm
7 0
3 years ago
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Using the relation dS = (δQ/T)int rev for the definition of entropy, calculate the change in the specific entropy of R-134a as i
pashok25 [27]

Answer:

The value of specific entropy = 0.847 \frac{KJ}{kg K}

Explanation:

Constant pressure = 120 K pa

From the property tables of R - 134 a at P = 120 K pa

Temperature T = - 22.5 ° c

Value of heat transfer = 212.32 \frac{KJ}{kg}

Thus entropy change ΔS = \frac{dq}{T}

⇒ ΔS = \frac{212.32}{250.5}

⇒ ΔS = 0.847 \frac{KJ}{kg K}

Therefore the value of specific entropy = 0.847 \frac{KJ}{kg K}

7 0
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The columns in the periodic table are called groups. What do the elements in Group 17 have in common
Kryger [21]

Answer:

They all have 7 valence electrons on it's outer shell.

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3 years ago
A solid substance that has a naturally geometric shape with symmetrically arranged plane faces
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It is a Crystalline
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In the reversible reaction: 2NO2 (g) ⇌ N2O4 (g) the formation of dinitrogen tetroxide releases heat and the formation of nitroge
xenn [34]

Answer: Option (B) is the correct answer.

Explanation:

According to Le Chatelier's principle, any disturbance causes in an equilibrium reaction will shift the equilibrium in a direction that will oppose the change.

For example, 2NO_{2}(g) \rightleftharpoons N_{2}O_{4}(g)

When we increase the temperature then the reaction will shift in a direction where there will be decrease in temperature.

This, means that the reaction will shift in the backward direction.

Thus, we can conclude that if the reaction is at equilibrium and the temperature increases, the equilibrium will shift so that there is more nitrogen dioxide.

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4 years ago
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