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2 years ago

Which part of the body protects organs , provides support, and forms blood cells

Chemistry

2 answers:

nata0808 [166]2 years ago

6 0

<span>the skeleton because if you didn't have bones then you wouldn't be able to stand up.</span>

ivanzaharov [21]2 years ago

6 0

The skeleton serves as the bony framework of the body which protects the vital organs such as the heart,liver,kidney etc. and it also supports the body.The red bone marrow forms the blood cells

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The average atomic mass of Eu is 151.96 amu. There are only two naturally occurring isotopes of europium, Eu with a mass of 151.

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The percentage abundance of Eu isotopes are 52 % and 48 % .

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:

Since the element has only 2 isotopes, so the let the percentage of first be x and the second is 100 -x.

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For second isotope :

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Given, Average Mass = 151.96 amu

Thus,

$151.96=\frac{x}{100}\times {151.0}+\frac{100-x}{100}\times {153.0}$

Solving for x, we get that:

x = 52 %

<u>Thus percentage abundance of Eu isotopes are 52 % and 48 % .</u>

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