The element X has two naturally occurring isotopes. The masses (amu) and % abundances of the isotopes are given in the table below. The average atomic mass of the element is amu. Isotope | Abundance (%) | Mass (amu) 31x 35.16 31.16 34x 6484 3430 O 35.22 O 30.20 O 32.73 O 33.20 О 34.02

Q: The two isotopes of potassium with significant abundance in nature are 39K (isotopic mass 38.9637…

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Q: The element X has three naturally occurring isotopes. The isotopic masses (amu) and % abundances of…

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Q: The atomic masses of 6 Li and 7 Li are 6.0151 amu and 7.0160 amu, respectively. Calculate the…

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Q: Complete the table. Element Mass Moles Number of Atoms Na 38.5 mg C 1.12 V 214 Hg 1.44 kg

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Q: Macmillan Learning, On another planet, the isotopes of titanium have the given natural abundances.…

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A: Explanation Solution Two substances, the percentage of each isotope, are unidentified. As both…

Q: Iron exists in nature as a mixture of predominantly three isotopes: ⁵⁴₂₆Fe (53.94 amu), ⁵⁶₂₆Fe…

A: We have to calculate the percentage of rarest of three isotopes.

Q: A sample of C, H, contains 4.69 x 1024 H atoms. How many carbon atoms does the sample contain?…

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Q: A newly discovered element, X, has 3 isotopes weighing 350 amu, 355 amu, and 357 amu. If the…

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Q: A sample of C,H, has 9.28 x 1024 H atoms. How many carbon atoms does the sample contain? number of…

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Q: Rubudium have two isotopes, 85Rb has mass 84.9117 amu and 87Rb has mass 86.905 amu. If the average…

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Q: The atomic masses of chlorine-35 (75.780%) and chlorine-37 (24.220%) are 34.969 amu and 36.966 amu,…

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Q: 7.53 × 10^23 molecules of an element has a mass of 88.64 g. What is the identity of this molecular…

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Q: Unknown element, Element X, exists in nature as two isotopes: ^{351}351 X has a mass of 350.9196 u…

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Q: An unknown element is a mixture of isotopes ¹²⁰X and ¹²²X. The average atomic mass of X is 121.47…

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Q: Iron exists in nature as a mixture of predominantly three isotopes: 54 426Fe (53.94 amu), 5626Fe…

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Q: natural rubidium has the average mass of 85.4678 AMU and is composed of isotopes Rb 85 (mass =…

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Q: 8- Bromine (Br) has two isotopes, with masses of 78.92 and 80.92 amu. The natural abundance of the…

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Q: Antimony has two naturally occuring isotopes, Sb121 and Sb123. Sb121 has an atomic mass of 120.9038…

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Q: The atomic masses of 10B and 11B are 10.0129 amu and 11.0093 amu, respectively. Calculate the…

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Q: How many helium (He) atoms are there in 3.75 moles of helium?   3.75 x 1023 atoms 3.99 x 1025 atoms…

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Q: Bromine and chlorine react to form simple diatomic molecules in a 1:1 ratio, BrCl. The natural…

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Q: For which element does a sample of 1.5055 × 1024 atoms have a total mass of 70.215 g? P, Si, S

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Q: The atomic masses of 79Br and 81Br are 78.918336 and 80.916290 amu, respectively. The average atomic…

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Q: ⒸMacmillan Learning On another planet, the isotopes of titanium have the given natural abundances.…

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Q: A hypothetical compound has the formula X(AZ3)3.   The atomic masses for A, X and Z are included in…

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Q: Determine the mass in grams of 5.30 × 10²¹ atoms of chromium. (The mass of one mole of chromium is…

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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.