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ra1l [238]
4 years ago
8

Relate the effect of temperature and pressure on

Chemistry
1 answer:
Anna007 [38]4 years ago
5 0

Answer:

According to the Kinetic-molecular theory, <u>increase in temperature</u> causes the <u>gas molecules' average speed and kinetic energy to increase</u>.if the <u>volume of the container is held constant</u>, <u>collision of gas molecules</u> will be <u>frequent</u> and with more force on the walls of the container,making the <u>pressure to increase.</u>

Explanation:

Remember that a gas pressure is affected by the rapidness of moving gas molecules which is directly proportion to number of molecules hitting a unit area of the container in a unit time.Kinetic-molecular theory can be explained from Boyle's law where a decreased volume of a container compresses the gas in the container due to reduced area,making gas molecules to collide with high frequency rising the pressure exerted by the gas.

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The current federal agency responsible for safety-related issues of nuclear energy is the:
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What element does the following electron configuration represent?
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Answer:

Rubidium (Rb).

Explanation:

From the question given above, the following data were obtained:

Electronic configuration => 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s¹

Name of element =?

To know the name of the element with the above electronic configuration, we shall determine the atomic number of the element. This can be obtained as follow:

Number of electrons = 2 + 2 + 6 + 2 + 6 + 2 + 10 + 6 + 1

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Next, we shall determine the number of protons. This can be obtained as follow:

From the question given above, the element has no charge. Hence the element contains equal numbers of protons and electrons.

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Next, we shall determine the atomic number. This can be obtained as follow:

The atomic number of an element is simply defined as the number of protons present in the atom of the element. Thus,

Atomic number = proton number

Proton is = 37

Therefore,

Atomic number = 37

Finally, we shall determine the name of the element by comparing the atomic number of those in the periodic table.

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5 0
3 years ago
Copper has two naturally occurring isotopes, 63Cu (isotopic mass 62.9296 amu) and 65Cu (isotopic mass 64.9278 amu). If copper ha
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Answer:

Percentage of first isotope = 69.152 %

Percentage of second isotope =  30.848 %

Explanation:

The formula for the calculation of the average atomic mass is:

Average\ atomic\ mass=(\frac {\%\ of\ the\ first\ isotope}{100}\times {Mass\ of\ the\ first\ isotope})+(\frac {\%\ of\ the\ second\ isotope}{100}\times {Mass\ of\ the\ second\ isotope})

Given that:

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For second isotope:

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63.546=\frac {x}{100}\times {62.9296}+\frac {(100-x)}{100}\times {64.9278}

Solving,

1.9982 x = 138.18

Thus,

<u>Percentage of first isotope = x = 69.152 %</u>

<u>Percentage of second isotope = 100 - x % = 30.848 %</u>

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