Explanation The number of atoms of gallium in the left pan is nine. Number of moles of gallium atoms is calculated as shown below; 9 atoms of gallium = 9 atoms×1 mol 6 .0221×10 23 atoms = 1.49 × 10 − 23 mol Therefore, moles of gallium is 1.49 × 10 − 23 mol . From this the mass of gallium atoms is calculated as follows; Mass of gallium = Number of moles of Gallium×Molar mass of gallium = 1.49 × 10 − 23 mol × 69.72 g ⋅ mol − 1 = 1.04 × 10 − 21 g Therefore, 1.04 × 10 − 21 g is the mass on the left pan. In order to make the mass equal on both pans, the pan that contain astatine atoms must have mass of 1.04 × 10 − 21 g

ACHIEVE/CHEMICAL PRINCIPLES ACCESS 2TERM

7th Edition

ISBN: 9781319403959

Author: ATKINS

Publisher: MAC HIGHER

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Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can b…

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Chapter F, Problem E.3E

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The number of astatine atoms that has to be present in the right pan has to be calculated in order to make the mass of two pans equal has to be calculated.

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Chapter F, Problem E.2E

Chapter F, Problem E.4E

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Chapter F Solutions

ACHIEVE/CHEMICAL PRINCIPLES ACCESS 2TERM

Ch. F - Prob. A.1AST Ch. F - Prob. A.1BST Ch. F - Prob. A.2AST Ch. F - Prob. A.2BST Ch. F - Prob. A.3AST Ch. F - Prob. A.3BST Ch. F - Prob. A.4AST Ch. F - Prob. A.4BST Ch. F - Prob. A.5AST Ch. F - Prob. A.5BST

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The number of astatine atoms that has to be present in the right pan has to be calculated in order to make the mass of two pans equal has to be calculated.

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Interpretation: The number of astatine atoms that has to be present in the right pan has to be calculated in order to make the mass of two pans equal has to be calculated.

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Chapter F Solutions

Interpretation:

The number of astatine atoms that has to be present in the right pan has to be calculated in order to make the mass of two pans equal has to be calculated.