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How do you calculate the average atomic mass when given percent abundance and mass number?
start by getting its isotpic mass. you can do this by taking the mass of an atom and dividing it by 12.01, which is kinown as the carbon standard and is used in the calculation for any element. this will give you a ratio. multiply this number by 12 amu and it will give you the isotopic mass. Next, multiply this number by the percentage in abundance as a fraction (ex. 92.12% = .09212)..... the resulting number will be your Atomic Mass ONLY for that isotope. To calculate the ATOMIC MASS of an element, you must repeat the previous steps for ALL isotopes. When this is finished, add the atomic masses for the isotopes together the get the atomic mass for that element. For a visual, we'll use Si (28)
(mass of Si atom)/ (mass of C standard) = 2.331411 that's your ratio
2.331411 x 12 amu = 27.97693 amu .... that's your isotopic mass for that specific isotope
27.97693 x .9223 (or 92.23%) = 25.8031..... that's your atomic mass for that isotope
Now the similar calculations done with the other isotopes of silicon give us..
Si(29) as (28.976495x.0467=1.3532) and Si(30) as (29.973770x.0310=.9292)
Lastly, add those together to get...
25.8031 + 1.3532+ .9292 = 28.09 amu which is the atomic mass for the element Silicon.
Good luck, chemistry sucks.
What else can I help you with?
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.
How is the atomic mass of each element on the periodic table calculate?
The atomic mass listed on most periodic tables is actually the average atomic mass representing the average atomic masses of the various isotopes of an element depending on their percent natural abundance. Refer to the answers.com question: What is the formula for finding average atomic mass? for a detailed explanation on how to calculate this value. (What_is_the_formula_for_finding_average_atomic_mass)
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 is the average atomic mass of 50 percent 197 Au 50 percent 198 Au?
The average atomic mass can be calculated by taking the weighted average of the atomic masses of the isotopes based on their abundance. For this case, the average atomic mass would be: (0.50 * 197) + (0.50 * 198) = 197.5.
What calculation should be used to calculate the correct average atomic mass of chlorine?
To calculate the average atomic mass of chlorine, you would take the abundance-weighted average of the isotopes of chlorine. This involves multiplying the atomic mass of each isotope by its relative abundance (in decimal form), then summing all the products.
What is percent abundance?
Take percent abundance times atomic mass for each isotope then add all up for average atomic mass.
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.
Chlorine has 2 isotopes and These have atomic masses 34.9689 amu and 36.9659 amu respectively Their ratio in nature is 75.77 percent and 24.23 percent respectively Calculate the average atomic ma?
Atomic mass of = 34.9689 amu Atomic mass of = 36.9659 amu % of = 75.77 % of = 24.23 Average atomic mass = amu Found this answer on examville.com
How is the atomic mass of each element on the periodic table calculate?
The atomic mass listed on most periodic tables is actually the average atomic mass representing the average atomic masses of the various isotopes of an element depending on their percent natural abundance. Refer to the answers.com question: What is the formula for finding average atomic mass? for a detailed explanation on how to calculate this value. (What_is_the_formula_for_finding_average_atomic_mass)
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 is the average atomic mass of 50 percent 197 Au 50 percent 198 Au?
The average atomic mass can be calculated by taking the weighted average of the atomic masses of the isotopes based on their abundance. For this case, the average atomic mass would be: (0.50 * 197) + (0.50 * 198) = 197.5.
What calculation should be used to calculate the correct average atomic mass of chlorine?
To calculate the average atomic mass of chlorine, you would take the abundance-weighted average of the isotopes of chlorine. This involves multiplying the atomic mass of each isotope by its relative abundance (in decimal form), then summing all the products.
One has an atomic weight of 120.9038 amu with 57.25 percent abundance the other has an amu of 122.8831 what is the atomic weight of the element?
To calculate the atomic weight of the element, you need to consider the weighted average of the two isotopes based on their abundance. Atomic weight = (atomic mass isotope 1 * abundance isotope 1) + (atomic mass isotope 2 * abundance isotope 2) Plugging in the values: Atomic weight = (120.9038 amu * 0.5725) + (122.8831 amu * 0.4275) = 69.17 + 52.6 = 121.77 amu.
Why do elements which exists as isotopes have fractional atomic mass?
Each isotope of an element has a different Atomic Mass, so an average is taken of all the isotopes, but the average is weighted because the natural abundance (%) of each isotope is factored in. If hydrogen-1 is much more abundant than deuterium and tritium, then the weighted average will be closer to 1 than 2 or 3 but not a whole number. The following equation shows how percent abundance factors into the weighted average. (atomic mass A)(X% abundance) + (atomic mass B)(Y% abundance)...=(weighted average of all isotopes of the element)(100% abundance)
What is the automic mass of chlorine atom?
Chlorine 35: exact weight: 34.968852, percent abundance: 75.77 Chlorine 37: exact weight: 36.965903, percent abundance: 24.23 average atomic weight; 35.453
What are the steps in the process of calculating average in atomic mass given data about the isotopes of an element?
To calculate the average atomic mass of an element, you need to multiply the mass of each isotope by its abundance (as a decimal), then sum these values for all isotopes of that element. This will give you the weighted average atomic mass. The formula is: average atomic mass = (mass isotope 1 x abundance 1) + (mass isotope 2 x abundance 2) + ...
If an element has 3 isotopes with known masses what other information is needed to find the average atomic mass of the element?
The abundance of each isotope is needed to find the average atomic mass of the element. The average atomic mass is calculated by multiplying the mass of each isotope by its abundance, summing those values, and then dividing by 100 to get the average atomic mass in atomic mass units.
