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2 years ago

HELP QUICK!! Match the term with the definition. (4 points)

Chemistry

2 answers:

Rufina [12.5K]2 years ago

7 0

Answer:

1. c.

2. d.

3. b.

4. a.

Explanation:

Evgesh-ka [11]2 years ago

6 0

2. d

1. c

3. a

4. b

I am not sure since I don't know what plasma is

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Naturally occurring element X exists in three isotopic forms: X-28 (27.979 amu, 92.21% abundance), X-29 (28.976 amu 4.70% abunda

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Answer: The average atomic mass of X is 28.09 amu

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Average atomic mass of an element is defined as the sum of masses of each isotope each multiplied by their natural fractional abundance.

Formula used to calculate average atomic mass follows:

$\text{Average atomic mass }=\sum_{i=1}^n\text{(Atomic mass of an isotopes)}_i\times \text{(Fractional abundance})_i$ .....(1)

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Percentage abundance of isotope 2 = 4.70 %

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Percentage abundance of isotope 3 = 3.09 %

Fractional abundance of isotope 3 = 0.0309

Putting values in equation 1, we get:

$\text{Average atomic mass of X}=[(27.979\times 0.9212)+(28.976\times 0.0470)+(29.974\times 0.0309)]$

$\text{Average atomic mass of X}=28.09amu$

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Explanation:

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