2 years ago

NEED IT ASAP!!!!!!!!!!!!!!!!!!!!!

1 answer:

6 0

A, if this is not correct, please choose D.

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slavikrds [6]

Answer: The atomic mass of a Europium atom is 151.96445 amu.

From the given information:

Percent intensity is 91.61% of Europium atom of molecular weight 150.91986 amu.

Percent intensity is 100.00% of Europium atom of molecular weight 152.92138 amu.

Abundance of Eu-151 atom:

$X_{Eu-151}=\frac{0.9161}{0.9161+1.000}=0.4781$

Abundance of Eu-153 atom:

$X_{Eu-153}=\frac{1.000}{0.9161+1.000}=0.5219$

Atomic mass of Europium atom:

$A=(X_{Eu-151}\times150.91986+X_{Eu-153}\times152.92138)amu\\A=(0.4781\times150.91986+0.5219\times152.92138)amu=151.96445 amu$

Therefore, the atomic mass of a Europium atom is 151.96445 amu.

3 0

3 years ago

SVETLANKA909090 [29]

Answer:

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Explanation:

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2 years ago

BlackZzzverrR [31]

Answer:

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3 years ago

mrs_skeptik [129]

the answer is c I hope this helps

4 0

3 years ago

Sophie [7]

Add 100 ML of sulfuric acid to 400 ML of base as an 80H B.

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3 years ago