Answered: 1. How many moles of Ca are there in a…

1. How many moles of Ca are there in a sample that contains 7.63x10²² calcium atoms? moles 2. How many calcium atoms are there in a sample that contains 1.81 mol of Ca? atoms

Chemistry for Engineering Students

4th Edition

ISBN:9781337398909

Author:Lawrence S. Brown, Tom Holme

Publisher:Lawrence S. Brown, Tom Holme

Chapter3: Molecules, Moles, And Chemical Equations

Section: Chapter Questions

Problem 3.79PAE: 3.79 Consider two samples. Sample A contains 2 moles of N2 and 1 mole of O2, and Sample B contains 1...

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Concept explainers

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.

Question

1. How many moles of Ca are there in a sample that contains 7.63x10²²
calcium atoms?
moles
2. How many calcium atoms are there in a sample that contains 1.81
mol of Ca?
atoms
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