Answered: 45.8 gg N2N2 Express your answer using…

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Chemistry

45.8 gg N2N2 Express your answer using three significant figures. How many molecules are in each sample?

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter4: Types Of Chemical Reactions And Solution Stoichiometry

Section: Chapter Questions

Problem 40E: High-density lipoprotein (HDL) cholesterol is the good cholesterol because adequate levels reduce...

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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

45.8 gg N2N2

Express your answer using three significant figures.

How many molecules are in each sample?

Expert Solution

Step 1

we know,

1mole = 6.022x10²³

The molar mass of N₂=28.01^g/_mol

So, we will first convert 45.8g N₂ to the number of moles of N₂

_{$Number of moles = \frac{Mass of sample}{Molar mass of sample}$}

_{$Number of molecules = Moles \times N_{A} N_{A} = Avogadro number = 6.022 \times 10^{23}$}

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