0
Just average out 34.968 amu and 36.956 amu
to get your answer
What else can I help you with?
Why does chlorine have an atomic mass of 35.5 write a short example of why this is so using the words protons neutrons isotope atomic number mass number etc?
Chlorine has an atomic mass of 35.5 because the atomic mass of an element is the number of protons plus the number of neutrons. In chlorine, there are always 17 protons (the number of protons in an atom is what makes it whichever element it is), but it is possible to have different amounts of neutrons in the atom. These are called different isotopes of an element. In chlorine, there can be between 17 and 20 neutrons meaning the mass number can range between 34 and 37. The reason that it is written as 35.5 on the periodic table is because that is the average mass number.
How does the atomic mass of carbon show that it is an isotopes?
If your asking "how does the mass show there are isotopes", then the answer is this: Isotopes are found by using a mass spectrometer, and the abundance (percent amount) of each isotope is determined. Using this percent of abundance, the AVERAGE mass is reported on the periodic table. For example, if carbon 12 had mass of 12 and carbon 13 had mass of 13, but the percent abundance of 12 was 99% and the abundance of 13 was 1%, then the atomac mass would be 12*.99+13*.01=12.01 You can tell it has isotopes by seeing that the mass is a decimal and not a whole number. It is harder to tell with carbon, because it's only off by .01, but looking at chlorine it is more clear. Most isotope weights are very close to being whole numbers, like Cl35 mass is 34.98 and Cl37 is 36.97. But looking at Cl atomic weight, it is 35.45; the .45 tells you it is a average because the value lies between the whole numbers as a decimal. Cl is 35.45, which is an average of 35 and 37 that's 76% and 24% abundance respectively.
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.
If 40 percent of the isotopes of an element have a mass of 16 atomic mass and 60 percent of the isotopes have a mass of 18 atomic mass what is the average atomic mass?
The average atomic mass can be calculated as the weighted average of the masses of each isotope, using their percentages as the weights. In this case, the average atomic mass would be: (0.4 * 16 amu) + (0.6 * 18 amu) = 6.4 amu + 10.8 amu = 17.2 amu.
Is an isotope a neutron?
Isotopes are atoms of the same chemical element that have different masses due to differing numbers of protons in the nucleus. These are all averaged out to give the "normal" atomic mass that's on the periodic table eg: Cl = 35.5 its abundancy is 75% Cl35 and 25% Cl37.
Why does chlorine have an atomic mass of 35.5 write a short example of why this is so using the words protons neutrons isotope atomic number mass number etc?
Chlorine has an atomic mass of 35.5 because the atomic mass of an element is the number of protons plus the number of neutrons. In chlorine, there are always 17 protons (the number of protons in an atom is what makes it whichever element it is), but it is possible to have different amounts of neutrons in the atom. These are called different isotopes of an element. In chlorine, there can be between 17 and 20 neutrons meaning the mass number can range between 34 and 37. The reason that it is written as 35.5 on the periodic table is because that is the average mass number.
How does the atomic mass of carbon show that it is an isotopes?
If your asking "how does the mass show there are isotopes", then the answer is this: Isotopes are found by using a mass spectrometer, and the abundance (percent amount) of each isotope is determined. Using this percent of abundance, the AVERAGE mass is reported on the periodic table. For example, if carbon 12 had mass of 12 and carbon 13 had mass of 13, but the percent abundance of 12 was 99% and the abundance of 13 was 1%, then the atomac mass would be 12*.99+13*.01=12.01 You can tell it has isotopes by seeing that the mass is a decimal and not a whole number. It is harder to tell with carbon, because it's only off by .01, but looking at chlorine it is more clear. Most isotope weights are very close to being whole numbers, like Cl35 mass is 34.98 and Cl37 is 36.97. But looking at Cl atomic weight, it is 35.45; the .45 tells you it is a average because the value lies between the whole numbers as a decimal. Cl is 35.45, which is an average of 35 and 37 that's 76% and 24% abundance respectively.
What is percent abundance?
Take percent abundance times atomic mass for each isotope then add all up for average atomic mass.
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.
If 40 percent of the isotopes of an element have a mass of 16 atomic mass and 60 percent of the isotopes have a mass of 18 atomic mass what is the average atomic mass?
The average atomic mass can be calculated as the weighted average of the masses of each isotope, using their percentages as the weights. In this case, the average atomic mass would be: (0.4 * 16 amu) + (0.6 * 18 amu) = 6.4 amu + 10.8 amu = 17.2 amu.
Is an isotope a neutron?
Isotopes are atoms of the same chemical element that have different masses due to differing numbers of protons in the nucleus. These are all averaged out to give the "normal" atomic mass that's on the periodic table eg: Cl = 35.5 its abundancy is 75% Cl35 and 25% Cl37.
If 75 percent of the isotopes of an element have a mass of 35.0 amu and 25 percent of the isotopes have a mass of 37.0amu what is the atomic mass of the element?
The atomic mass is calculated by averaging the masses of the isotopes based on their abundance. In this case, 75% of the isotopes have a mass of 35.0 amu and 25% have a mass of 37.0 amu. Atomic mass = (0.75 * 35.0 amu) + (0.25 * 37.0 amu) = 35.5 amu.
Does The element with the largest subscript in a formula have the largest percent by mass in the compound?
Sometimes, but not necessarily: The largest percent by mass in a compound is that of the element for which the product of the subscript and the atomic weight is highest. For example, there is more carbon than hydrogen by mass in CH4.
What is the percent composition of phosphoric acid in the formula H3PO4?
The percent composition of phosphoric acid (H3PO4) can be calculated as follows: Percentage of hydrogen (H): (3 x atomic mass of H) / molar mass of H3PO4 Percentage of phosphorus (P): (atomic mass of P) / molar mass of H3PO4 Percentage of oxygen (O): (4 x atomic mass of O) / molar mass of H3PO4 These values can be used to determine the percent composition of each element in phosphoric acid.
What is the difference between atomic percent and weight percent?
Atomic percent is based on the number of atoms in a sample. So if the sample has x number of oxygen atoms and x number of iron atoms it would report 50% oxygen and 50% iron (atomic percent). Weight percent is based on the mass of the elements detected. So if we used the above example and reported the results as weight percent we would get 22.3% oxygen and 77.7% iron. Weight percent takes into consideration the mass or atomic weight of the elements and not just the number of atoms. Most people use weight percent although for chemistry atomic percent may be more useful.
What is average atomic mass of 75.47 percent and a mass of 248.7 amu and 24.53 percent and mass of 249.4 amu?
the amu is 248.863 all u do is for each one the mass × percent divided by a 100 if there is more u do the same and add them together
What is the formula for the percent by mass of a compound?
((mass of element)/(mass of compound))*100
