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Ch.2 - Atoms, Molecules, and Ions
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All textbooksBrown 14th EditionCh.2 - Atoms, Molecules, and IonsProblem 99b

Chapter 2, Problem 99b

It is common in mass spectrometry to assume that the mass of a cation is the same as that of its parent atom. (b) What percentage of the mass of an 1H atom does the electron represent?

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Hi everyone today. We have a question telling us that mass spectrometry, the mass of a cat ion is taken as the mass of the atom from which the cat ion was formed, even though the cat eye on its missing electrons calculate what percent of the mass of a lithium seven atom is represented by two electrons. And is this percentage significant? So the mass of lithium seven is seven 0. 6005 units. And the mass of an electron is 0. zero eight 58 units. So now we're going to calculate the mass percent and that's going to equal two Times 0. 54 units. Because we have two electrons, we're multiplying by two there over 7. units. And we're going to multiply that by 100 because we want a percentage And that equals 0. 64%. So no, this is not a significant percentage. And those are our answers. Thank you for watching. Bye.
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Textbook Question

There are two different isotopes of bromine atoms. Under normal conditions, elemental bromine consists of Br2 molecules, and the mass of a Br2 molecule is the sum of the masses of the two atoms in the molecule. The mass spectrum of Br2 consists of three peaks: Mass (u) Relative Size 157.836 0.2569 159.834 0.4999 161.832 0.2431 (c) Determine the average molecular mass of a Br2 molecule.

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Textbook Question

There are two different isotopes of bromine atoms. Under normal conditions, elemental bromine consists of Br2 molecules, and the mass of a Br2 molecule is the sum of the masses of the two atoms in the molecule. The mass spectrum of Br2 consists of three peaks: Mass (u) Relative Size 157.836 0.2569 159.834 0.4999 161.832 0.2431 (d) Determine the average atomic mass of a bromine atom

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Textbook Question

There are two different isotopes of bromine atoms. Under normal conditions, elemental bromine consists of Br2 molecules, and the mass of a Br2 molecule is the sum of the masses of the two atoms in the molecule. The mass spectrum of Br2 consists of three peaks: Mass (u) Relative Size 157.836 0.2569 159.834 0.4999 161.832 0.2431 (e) Calculate the abundances of the two isotopes. Calculate the abundance of the heavier isotope.

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Textbook Question

The first atoms of seaborgium (Sg) were identified in 1974. The longest-lived isotope of Sg has a mass number of 266. (a) How many protons, electrons, and neutrons are in an 266Sg atom?

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Textbook Question

The first atoms of seaborgium (Sg) were identified in 1974. The longest-lived isotope of Sg has a mass number of 266. (b) Atoms of Sg are very unstable, and it is therefore difficult to study this element's properties. Based on the position of Sg in the periodic table, what element should it most closely resemble in its chemical properties?

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