Two isotopes of rubidium occur naturally, with 37/85Rb at 72.17% (84.91 amu) and 87/37Rb at 27.83% (86.91 amu). Calculate the atomic mass for rubidium using the weighted average mass method.

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A: Atoms of the same element have the same number of protons, which is also called the atomic number.

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A: Given: Isotope of Antimony (Sb)  % abundance  Sb-121.  57.21%.  Sb-123. 42.79%.

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Q: Two isotopes of rubidium occur naturally, Rb-85 at 72.17% (84.91 amu) and Rb-87 at 27.83% (86.91…

A: Given, two isotopes of rubidium as follows,Rb-85 at 72.17% (84.91 amu) and Rb-87 at 27.83% (86.91…

Q: Question attached

A: Ans: Rb-85 = 72.17% = 0.7217 * 84.91 amu = 61.2795 Rb-87 = 27.83% = 0.2783 * 86.91 amu = 24.1871

Q: Calculate the atomic mass of the element: Mass                Abundance 22.1760             45.00%…

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Q: Gallium occurs naturally as 69Ga and 71Ga. Given the mass and abundance of gallium-69 (68.92 amu…

A: Given, Gallium occurs naturally as 69Ga and 71Ga and mass and abundance of gallium-69 is 68.92 amu…

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Q: What letters are used to designate atomic number and mass number in isotopic notation of atoms?

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Q: A certain element consists of two stable isotopes. The first has an atomic mass of 106.9051 amu and…

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Q: Element: Uranium Mass Abundance Abundance Number of Neutrons Number of Name of isotope (amu) (%)…

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Q: atomic mass of this factious element.

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Q: Use Grubbs test to decide if the maximum value is an outlier.

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Q: Calculate the average isotopic mass of krypton given: Mass / u. Percentage (%) 77.920 0.350 79.916…

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Q: two isotopes of rubidium occur naturally, Rb with mass of 85 and atomic number of 37 at 72.17%…

A: Average atomic mass can be determined by the equation given below:

Q: mass е relative (amu) abundance 111.9 90.3% 118.9 9.7%

A: Average Atomic mass = = (M1X1 + M2X2)/(X1+X2) = (111.9×90.3 + 118.9×9.7)/100 = 112.579 amu = 113

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Q: unisauaPIAL :ua ar Number of Neutrons Number of Abundance Abundance Name of isotope Mass (amu) (%)…

A: Mass number is sum of protons and neutrons in a nucleus.

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Atoms and Molecules

An atom is the smallest unit of an element that possesses all the properties of that particular element. Molecules are the smallest unit of a substance that possess all the properties of that particular substance.