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Sergeu [11.5K]
3 years ago
11

A container of gas is initially at 0.500 atm and 298 K. What will the pressure be at 398 K?

Chemistry
1 answer:
Vitek1552 [10]3 years ago
3 0

Answer:

5

Explanation:

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The combined gas law is...

P1V1/T1 = P2V2/T2

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- Hope this helps! If you need a further explanation please let me know.

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A naturally occurring sample of an element contains only two isotopes. The first isotope has a mass of 68.9255 amu and a natural
Ket [755]

Answer:- The average atomic mass or the atomic mass of the element is 69.7230 amu.

Solution:- The atomic mass or also known as average atomic mass of an element is calculated from it's isotopes by using the formula:

average atomic mass = mass of First isotope(abundance) + mass of second isotope(abundance)

From given data, the mass of first isotope is 68.9255 amu and mass of second isotope is 70.9247 amu. percent abundance for the first isotope is 60.11%. The sum of percent abundance of all the isotopes of an element is always 100. So, the percent abundance of second isotope = 100 - 60.11 = 39.89%

We convert the percent abundances to the decimals and then plug in the values in the formula to calculate the average atomic mass.

First isotope abundance = 0.6011

second isotope abundance = 0.3989

average atomic mass = 68.9255(0.6011) + 70.9247(0.3989)

average atomic mass = 41.4311 + 28.2919

average atomic mass = 69.7230 amu

So, the average atomic mass or the atomic mass of the element is 69.7230 amu.

3 0
3 years ago
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