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1 year ago

Convert the scientific notation to a decimal number.

Chemistry

1 answer:

valina [46]1 year ago

6 0

To convert Scientific Notation to a decimal number, Prescribed steps are to be taken given below.

<h3>What is Scientific Notation ?</h3>

Scientific notation is a way of writing very large or very small numbers.

A number is written in scientific notation when a number between 1 and 10 is multiplied by a power of 10.

<h3>Steps to Calculate Scientific Notation ;</h3>

Determine the exponent, n , on the factor 10 .
Move the decimal n places, adding zeros if needed.
If the exponent is positive, move the decimal point n places to the right.
If the exponent is negative, move the decimal point |n places to the left.
Check.

Learn more about Scientific Notation here ;

brainly.com/question/2005529

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Answer:

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2 years ago

Antimony has two naturally occuring isotopes, 121 Sb and 123 Sb . 121 Sb has an atomic mass of 120.9038 u , and 123 Sb has an at

valina [46]

Answer:

Percentage abundance of 121 Sb is = 57.2 %

Percentage abundance of 123 Sb is = 42.8 %

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.

For first isotope, 121 Sb :

% = x %

Mass = 120.9038 u

For second isotope, 123 Sb:

% = 100 - x

Mass = 122.9042 u

Given, Average Mass = 121.7601 u

Thus,

$121.7601=\frac{x}{100}\times 120.9038+\frac{100-x}{100}\times 122.9042$

$120.9038x+122.9042\left(100-x\right)=12176.01$

Solving for x, we get that:

x = 57.2 %

<u>Thus, percentage abundance of 121 Sb is = 57.2 % </u>

<u>percentage abundance of 123 Sb is = 100 - 57.2 % = 42.8 %</u>

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Hope this helps :)

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