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3 years ago

A 2.00L mixture of helium, nitrogen, and neon has a total pressure of 815 mmHg at a

Chemistry

1 answer:

Olin [163]3 years ago

4 0

Answer: The partial pressure of neon in the mixture is 263 mm Hg

Explanation:

According to Dalton's law, the total pressure is the sum of individual pressures.

$p_{total}=p_{He}+p_{N_2}+p_{Ne}$

Given : $p_{total}$ =total pressure of gases = 815 mm Hg

$p_{He}$ = partial pressure of helium = 201 mm Hg

$p_{N_2}$ = partial pressure of nitrogen = 351 mm Hg

$p_{Ne}$ = partial pressure of Neon = ?

putting in the values we get:

$815mm Hg=201 mm Hg+351 mm Hg+p_{Ne}$

$p_{Ne}=263mmHg$

The partial pressure of neon in the mixture is 263 mm Hg

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Why does it make sense that Hydrogen and Helium would be the first elements to form in the Universe?

Illusion [34]

Answer:

Explanation:

It makes sense because Helium and Hydrogen only hold 1 and 2 subsequent protons/neutrons and electrons. When the Big Bang happened the entire universe was so hot that it was impossible for elements to form since it was impossible for electrons to stay bound to the atoms. After a few seconds the universe began to cool enough for electrons to bond to atoms and create different elements. Since Helium and Hydrogen have 1 and 2 electrons subsequently we can assume that they were the first elements to be created. Also they are the most abundant elements in the Universe which backs up this theory.

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3 years ago

A student increases the temperature of a 200^3 cm balloon from 60°C to 120°C. What will the new volume of the balloon be? (Be ca

Darina [25.2K]

Explanation:

Given parameters:

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Unknown:

Final volume = ?

Solution:

According to Charles law, at constant pressure, the volume of a given mass of gas is directly proportional to temperature.

mathematically;

$\frac{V_{1} }{T_{1} } = \frac{V_{2} }{T_{2} }$

1 and 2 are the initial and final states

V is the volume and T is the temperature

convert the temperature to kelvin

T1 = 60 + 273 = 333K

T2 = 120 + 273 = 393K

Input the parameters;

$\frac{200}{333} = \frac{V_{2} }{393}$

final volume is 236cm³

learn more:

Boyle's law brainly.com/question/8928288

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3 years ago

Which term best describes a nuclear chain reaction?. A)self-sustaining. B)weak. C)non-explosive

Allisa [31]

Since we're talking about a chain reaction, I think this would be a) self-sustaining. Chain reactions are not usually described as "weak" and can be highly explosive depending upon the compounds (think Uranium!). The first (artificial) self-sustaining nuclear reaction is attributed to Enrico Fermi in 1942. Here's a bit of history: http://www.atomicarchive.com/History/firstpile/firstpile_01.shtml

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4 years ago

Read 2 more answers

Plz help ugh!! will upvote

erma4kov [3.2K]

All are CORRECT except (d)

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3 years ago

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Pachacha [2.7K]

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3 years ago