Answered: how the following balanced in order for…

how the following balanced in order for me to understand? Thank you! Cr+ O2 -> Cr2O3 Cu2S + O2 -> Cu + SO2 MgO + Fe -> Fe2O3 + Mg

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter13: Titrations In Analytical Chemistry

Section: Chapter Questions

Problem 13.27QAP

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Spectroanalytical Methods

Spectroanalytical methods measure the wavelength and intensity of radiations that are either emitted or absorbed by a molecular or atomic species. These methods are useful for evaluating the electronic or atomic arrangement of the molecules of a given analyte.

Question

Hello! I'm trying to submerge myself into this topic. Could you balance the following and explain few details of how the following balanced in order for me to understand? Thank you!

Cr+ O2 -> Cr2O3
Cu2S + O2 -> Cu + SO2
MgO + Fe -> Fe2O3 + Mg
AlCl3 + H2O -> Al(OH)3 + HCl
NaNO3 + H2SO4 -> Na2SO4 + HNO3

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