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The atomic weight of a newly discovered element is 110.352 amu. It has two naturally occurring isotopes. One has a mass of 111.624 amu. The other has an isotopic mass of 109.75 amu. What is the percent abundance of the last isotope (109.75 amu)?
The idea here is that each isotope will contribute to the average of the element proportionally to their respective abundance. Now, the key to this problem lies in how you...
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Calcium has three different isotopes. One has a mass of 35.00 amu; another has a mass of 41.00 amu; and another has a mass of 40.00 amu. Which isotope is the most abundant of the three?
It follows that whatever atomic mass is quoted on the Periodic Table, the most abundant isoptope of that element must make the greatest statistical contribution. Calcium has an atomic mass...
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There are 3 isotopes of carbon. Carbon-12, Carbon-13 and Carbon-14. The average atomic mass of carbon is 12.011. Which isotope of carbon is the most abundant? Why?
The relative of carbon is 12.011, which is extremely close to 12.0. This means that the masses C-13, and C-14 are practically negligible when contributing to the relative atomic mass...
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Carbon has a third isotope, named carbon-13. How many protons and neutrons are found in each atom of carbon-13. Carbon-13 is a stable isotope, like carbon-12. How useful would carbon-13 be for radiometric dating?
This is called the of the element. To make it up to 13 in carbon-13, you will need 7 neutrons. Stable isotopes are not useful at all in radio-dating,...
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What is the average atomic mass of an element if, out of 100 atoms, 5 have a mass of 176 amu, 19 have a mass of 177 amu, 27 have a mass of 178 amu, 14 have a mass of 179 amu, and 35 have a mass of 180 amu?
The $"Average Atomic Mass"$ of an element is defined as "the weighted average mass of all naturally-occurring (occasionally radioactive) of the element." (and hence the name "average") [1] Dividing the...
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The mass of a hydrogen atom is 1.0 amu, and the mass of a carbon atom is 12.0 amu. What is the moiar mass of methane, $CH_4$?
Molar Mass of $CH_4= 12+4$ Molar Mass of $CH_4= 16$ amu
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$CH_4$ is the chemical formula for methane. In order to produce a single molecule of methane, how many carbon (C) atoms are needed? Hydrogen atoms?
You have the one molecule of $CH_4$. How many carbons? How many hydrogens? Both quantities are $>=1$. While I couldn't do this rxn, we could certainly evaluate its thermodynamic parameters:...
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Would mixtures of the following species be mutually soluble: $(i)$ potassium chloride, and methane; $(ii)$ $KCl$, and carbon tetrachloride; $(iii)$ potassium chloride, and water; $(iv)$ methane, and carbon tetrachloride; $(v)$ methane, and water?
$"1. Potassium chloride and methane"$, a volatile hydrocarbon, and an ionic solid. NOT MUTUALLY SOLUBLE. $"2. Potassium chloride and carbon tetrachloride"$, another (less) volatile hydrocarbon, and an ionic solid. NO....
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A compound containing only carbon and hydrogen has a carbon-to-hydrogen mass ratio of 11.89. Which carbon-to-hydrogen mass ratio is possible for another compound composed only of carbon and hydrogen?
Trying to present a possible Answer We know that the molar mass of carbon and hydrogen are $C=12"g/mol" and H = 1"g/mol"$ When Carbon Hydrogen mass ratio is 11.89 The...
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What is the empirical formula of methane given methane can be decomposed into 4.5 g of carbon and 1.5 g of hydrogen?
Your goal when trying to figure out a compound's empirical formula is to find the smallest whole number ratio that exists between its constituent . The problem tells you...
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