Chemistry, 05.07.2019 18:00 sierransha08

Naturally occurring europium (eu) consists of two isotopes was a mass of 151 and 153 . europium-151 has an abundance of 48.03% and europium-153 has and abundance of 51.97%. what is the atomic mass of europium?

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Answer from: irmaespinoza76ie

152.04 u is the atomic mass of europium.

Given:

The two isotopes of europium(Eu).

Europium-151 has an abundance of 48.03% and Europium-153 has an abundance of 51.97%

To find:

The atomic mass of europium.

Solution:

Mass of Europium-151 = 151 u

The percentage abundance of Europium-151 = 48.03%

The fractional abundance of Europium-151 = 0.4803

Mass of Europium-153 = 153 u

The percentage abundance of Europium-153 = 51.97%

The fractional abundance of Europium-153 = 0.5197

The average atomic mass of Europium = A.M

$A.M=\Sum{\text{Mass of isotope }\times \text{Fractional abundance of isotope}}\\=151u\times 0.4803+153u\times 0.5197=152.0394 u\approx 152.04 u$

152.04 u is the atomic mass of europium.

Learn more about the average atomic mass here:

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Answer from: sundaywallace6361

151.94 u

Explanation:

The atomic mass of Eu is the weighted average of the atomic masses of its isotopes.

We multiply the atomic mass of each isotope by a number representing its relative importance (i.e., its percent abundance).

The atomic masses of Eu-151 and Eu-153 are 150.92 u and 152.92 u, respectively.

Set up a table for easy calculation.

0.4803 × 150.92 u = 72.472 u

0.5197 × 152.92 u = 79.473 u

TOTAL = 151.94 u

Answer from: Quest

metals are good conductor of electricity. it has free electrons on their surface. according to electron pool theory, each atom present in a metal crystal losses all of its valence electron and as a result a pool of free is form. these pool of electrons are free to move and conduct electricity easily while making metal as good conductor.

the correct answer is a. the ability of electrons to flow throughout the metal.

if it's not useful, feel free to report for mistake in answer.

Answer from: Quest

Iwould you figure it out but you don't have a picture or in your question as to what the physical property you're looking for is

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Naturally occurring europium (eu) consists of two isotopes was a mass of 151 and 153 . europium-151...