Answer the following questions on Avogadro's Number and the mole. (SHOW WORK and round ALL final answers to 2 decimal places) How many moles of CaCl2 does 2.41 x 1024 molecules represent? How many atoms does 2.0 moles of He represent? How many sodium ions are in 3.0 moles of NaCI?

Answer the following questions on Avogadro's Number and the mole. (SHOW WORK and round ALL final answers to 2 decimal places) How many moles of CaCl2 does 2.41 x 1024 molecules represent? How many atoms does 2.0 moles of He represent? How many sodium ions are in 3.0 moles of NaCI?

Chemistry for Engineering Students

3rd Edition

ISBN:9781285199023

Author:Lawrence S. Brown, Tom Holme

Publisher:Lawrence S. Brown, Tom Holme

Chapter3: Molecules, Moles, And Chemical Equations

Section: Chapter Questions

Problem 3.85PAE

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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.

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Answer the following questions on Avogadro's Number and the mole. (SHOW WORK and round ALL final answers to 2 decimal places)

How many moles of CaCl₂ does 2.41 x 10²⁴ molecules represent?
How many atoms does 2.0 moles of He represent?
How many sodium ions are in 3.0 moles of NaCI?

Definition Definition Number of atoms/molecules present in one mole of any substance. Avogadro's number is a constant. Its value is 6.02214076 × 10 23 per mole.

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