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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?
That is done to calculate the weighted average.
What is the natural percent abundance of the heavier isotope of gallium?
5%
What are the toxins in antimony?
Antimony is an element, so the only substance that can be found in it is antimony. Antimony is itself a toxin.
How do you calculate the atomic mass of an element with different isotopes?
To calculate average atomic mass from different isotopes of an element, we take into account the relative atomic masses of isotopes and their relative abundance on Earth. The following formula is used to calculate the needful : atomic mass = mass of isotope x percent abundance + mass of isotope x percent abundance / 100 (whole expression divided by 100)
What element does Sb stand for?
Sb is the chemical symbol of antimony (stibium).
Which isotopes has the greater natural abundance in antimony?
Antimony (121.90) has the greater abundance, Because its molecular mass is closer to that of Antimony which is(121.75)
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%.
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.
Why is each isotope's mass multiplied by the isotope's percent abundance?
That is done to calculate the weighted average.
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 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 the percent abundance of cobalt in the universe?
Its percent abundance is 0%.* * Co60 has a relatively short half-life of 5.27 years, and so, is not found in nature at all. Therefore, its percent abundance is not relevant. It is produced artificially.
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 abundance of Ag-107 is 51.84 percent What is the natural abundance of Ag-109?
48.16%
What is the empirical formula of a compound that is 50.7 percent antimony and 49.3 percent selenium by weight?
We assume 100 grams of the compound and turn those percentages into grams and get the moles. 50.7 grams antimony (1 mole Sb/121.8 gram) = 0.41626 moles antimony ================================ Now, the smallest mole number (antimony) becomes 1 and the other number is divided by it(antimony) to get the empirical numbers. 0.62467 moles Se/0.41626 moles Sb = 1.5 ----------------so, this happens sometimes and this is what we do (SbSe1.5)*2 = Sb2Se3 -----------------The empirical formula Antimony selenide
What is the natural percent abundance of the heavier isotope of gallium?
5%
What is xenon percent abundance in earth's crust?
I have no freaking idea...................................................................................
