Question 30How many calcium atoms are present in a sample of 20.0 g of calcium? The molar mass of calcium is 40.08 g/mol.3.00 x 1023 atoms1.20 x< 1025 atoms1.50 x 1022 atoms2.41 x 1025 atoms

Mass of Ca = 20.0 g Molar mass(MM) of Ca = 40.08 g Moles of Ca = Mass/MM = 20.0/40.08 = 0.500…

Answered: 3.00 x 1023 atoms

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Chemistry

3.00 x 1023 atoms

Chemistry: Matter and Change

1st Edition

ISBN:9780078746376

Author:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom

Publisher:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom

Chapter10: The Mole

Section10.4: Empirical And Molecular Formulas

Problem 67SSC

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Mole Concept

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 be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.

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