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Pani-rosa [81]
2 years ago
7

1. Imagine you have a sealed 20.0 L balloon filled with helium gas at 750 mmHg in the

Chemistry
1 answer:
SVETLANKA909090 [29]2 years ago
6 0

Answer:

17.6510 L

Explanation:

First we should get the number of moles of helium here by Boyle's law

PV=nRT

P=750/760= 0.9868 atm

T=25+273=298 kelvin

R= 0.08206

V= 20L

so

n=PV/RT

n=0.9868×20/0.08206×298

n=0.80707 mol

Then use the same law

V=0.80707×0.08206×263/0.9869=

17.6510L

SO THE VOLUME WILL BE 17.6510 L

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the symbol for xenon (xe) would be a part of the noble gas notation for the element antimony. cesium.
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The symbol for xenon (xe) would be a part of the noble gas notation for the element cesium.

For writing the electronic configuration of any element by using the preceding noble gas configuration, we simply use the symbols of noble gas belongs to the previous period of that particular elements. We can't use the symbol of noble gas of same period from which the element belong.

A is the wrong option because the noble gas in the preceding period to the period from which antimony belongs is krypton.

The actual electronic configuration of antimony is as follow:

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B is correct option because the noble gas in the preceding period to the period from which Cesium belongs is Xenon.

The actual electronic configuration of Cesium is as follow:

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Thus, we concluded that the symbol for xenon (xe) would be a part of the noble gas notation for the element cesium.

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