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3 years ago

At STP, a sample of which element has the highest entropy?

Chemistry

2 answers:

frosja888 [35]3 years ago

7 0

Answer: Option (4) is the correct answer.

Explanation:

STP means standard temperature and pressure, that is, at STP temperature is 0 degree Celsius, volume is 22.41 L, and pressure is 1.00 atm.

Entropy means that degree of randomness, that is, particles of a matter will move rapidly from one place to another.

In gases, molecules move randomly as they are held by weak Vander waal forces.

Thus, out of the given options, at STP, a sample of $F_{2}(g)$ element has the highest entropy.

Vlad1618 [11]3 years ago

5 0

(4) F2(g) is your answer, since gases have the highest entropy of all the three basic states of matter (yes, by this I am excluding plasma -_-)

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The theory of plate tectonics describes the movement of continental plates across the Earth's surface as if they were riding on

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Answer:

B and E

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What mass of H₂ is needed to react with 8.75 g of O₂ according to the following equation: O2(g) + H2(g) → H₂O(g)?

FromTheMoon [43]

Explanation:

For reacting with 8.75 grams of oxygen, 1.08 grams of hydrogen is required.

The given balanced equation has been:

\rm O_2\;+\;2\;H_2\;\rightarrow\;H_2OO2+2H2→H2O

From the equation, 1 mole of oxygen reacts with 2 mole of hydrogen to give 1 mole of water.

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Since,

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Thus, for reacting with 8.75 grams of oxygen, 1.08 grams of hydrogen is required.

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2 years ago

(a) Calculate the total volume (in liters) of air an adult breathes in a day. (b) In a city with heavy traffic, the air contains

Furkat [3]

Answer:

a) V air/day = 8640 L air an adult breaths / day

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Explanation:

a) one average person has 12 breaths for min:

P = 12 breath/min

in each breath it take an average of 500 mL on air.

1 breath ≅ 500 mL air

⇒ 12 breath / min * 500mL air / breath = 6000 mL air / min

the average air volume per day of a person is:

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3 years ago

How many molecules of CF₂Cl₂ are in 45.7 grams of CF₂Cl₂? (Show work)

posledela

Answer:

The answer to your question is: 2.20 x 10 ²³ molecules

Explanation:

Data

mass = 45.7 g

molecules of CF₂Cl₂ = ?

Process

1.- Calculate the mass number of CF₂Cl₂

C = 12 F =2 x 19 Cl = 2 x 35.5

total = 12 + 38 + 71

total = 121 g

2.- Use the Avogradro's number to solve the problem

121 g ------------------- 6.023 x 10²³ molecules of CF₂Cl₂

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x = 2.75 x 10²⁵ / 121

x = 2.20 x 10 ²³ molecules

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