Answered: A compound M,Se; contains 8.725 g M for…

A compound M,Se; contains 8.725 g M for every 9.000 g Se. Determine the identity of M and give the proper name of the compound.

Chemistry for Engineering Students

4th Edition

ISBN:9781337398909

Author:Lawrence S. Brown, Tom Holme

Publisher:Lawrence S. Brown, Tom Holme

Chapter2: Atoms And Molecules

Section: Chapter Questions

Problem 2.37PAE: 2.37 Why are empirical formulas preferred for describing polymer molecules?

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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

5) A compound M2Se; contains 8.725 g M for every 9.000 g Se. Determine the identity of M and
give the proper name of the compound.

Expert Solution

Step 1

The ratio of the 2:3 is obtained from the compound's chemical formula.

Element	M	Se
mass	8.725g	9.000g
molar mass	Xg/mol	78.96
moles =mass/molar mass	8.725g/xg/mol	0.114
ratio	2	3

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