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The Atomic Mass of an element is the weighted average of the masses of its isotopes. You know that: Antimony-121 has a mass of 120.9038 u, x% abundance Antimony-123 has a mass of 122.9042 u, y% abundance There are only 2 isotopes for antimony and their percent abundances should add up to 100%. In other words: x% + y% = 100% y = 1-x (percentages written as decimals) So, now let's put everything together. In order to calculate the atomic mass, multiply the percent abundance of an isotope by its atomic mass; then add the product of all the isotopes: (Atomic Mass of Antimony-121)(Percent Abundance of Antimony-121) + (Atomic Mass of Antimony-123)(Percent Abundance of Antimony-123) = Atomic Mass of Element Antimony (120.9038 amu)(x) + (122.9042 amu)(y) = 121.760 amu Replacing 1-x for y gives: (120.9038 amu)(x) + (122.9042 amu)(1-x) = 121.760 amu Solve for x: 120.9038x + 122.9042 -122.9042x = 121.760 amu -2.0040x = -1.1442 x = 0.57096 = 57.096% Solve for y: y = 1 - x y = 1 - 0.57096 = 0.42904 = 42.904%
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Why is each isotope's mass multiplied by the isotope's percent abundance?
Each isotope's mass is multiplied by its percent abundance to account for the contribution of each isotope to the overall average atomic mass of an element. This calculation ensures that the final average atomic mass reflects the weighted average of the masses of all isotopes based on their abundance in nature.
What is the natural percent abundance of the heavier isotope of gallium?
The natural percent abundance of the heavier isotope of gallium, gallium-71, is approximately 39.892%.
What element does Sb stand for?
Sb is the chemical symbol of antimony (stibium).
What is the most abundant isotope of Antimony?
Antimony-121 at 57.25%, the rest is Antimony-123
What period is antimony in?
Antimony is in period 5
Which isotopes has the greater natural abundance in antimony?
Antimony has two stable isotopes: antimony-121 and antimony-123. Antimony-121 has a higher natural abundance at approximately 57.2%, while antimony-123 makes up the remaining abundance at around 42.8%.
How do you calculate percent abundance for silicon?
You calculate the total amount of whatever it is that you want to find the silicon abundance for. Then you calculate the amount f silicon in that. Then percentage abundance of silicon = 100*amount of silicon/total amount Typically the amount would be measured as the mass.
How do you calculate the fractional abundance of Cl-37?
The fractional abundance is calculated by dividing the abundance of the isotope of interest by the abundance of all the isotopes of the element. For chlorine-37, the percent abundance is 0.2434, or 24.34%.
What is an example of calculating a percent abundance?
after inspection of fabric based on 4 point system how to calculate the % of fabric pass or fail
What is the percent abundance for boron?
The percent abundance of boron is approximately 19.78% for ^10B and 80.22% for ^11B.
How do you calculate the relative abundance of two isotopes?
To calculate the relative abundance of two isotopes, you would divide the abundance of one isotope by the total abundance of both isotopes and then multiply by 100 to get a percentage.
Why is each isotope's mass multiplied by the isotope's percent abundance?
Each isotope's mass is multiplied by its percent abundance to account for the contribution of each isotope to the overall average atomic mass of an element. This calculation ensures that the final average atomic mass reflects the weighted average of the masses of all isotopes based on their abundance in nature.
What is is the result when you total the individual relative abundance?
the result is 1.00, because relative abundance is just the percent abundance in decimal form. The percent abundance sum is 100%, therefore the answer is 1.00 because the decimal of 100% is 1.00
What is percent abundance?
Take percent abundance times atomic mass for each isotope then add all up for average atomic mass.
What is the natural percent abundance of the heavier isotope of gallium?
The natural percent abundance of the heavier isotope of gallium, gallium-71, is approximately 39.892%.
What is the percent abundance of argon gas?
It accounts ofr 0.934% by volume, of the earth's atmosphere.
How do you calculate the abundance of boron isotopes?
To calculate the abundance of boron isotopes, you would typically need to know the masses and natural abundances of each isotope. You can then use these values to calculate a weighted average, taking into account the abundance of each isotope relative to its mass. The formula for calculating isotopic abundance involves multiplying the natural abundance of each isotope by its mass and then summing these values for all isotopes.
