Chemistry: A Molecular Approach (3rd Edition)

Published by Prentice Hall
ISBN 10: 0321809246
ISBN 13: 978-0-32180-924-7

Chapter 3 - Sections 3.1-3.12 - Exercises - Problems by Topic - Page 134: 106b

Answer

$Fe_{2}O_{3}(s)+ 3H_{2}(g)\ -->\ 2Fe(s) + 3H_{2}O(l)$

Work Step by Step

Write out the equation without coefficients. Add a coefficient of 2 to the solid iron to balance the 2 irons in the iron(III) oxide. Add a coefficient of 3 to the water to balance out the oxygen in the iron(III) oxide. Finally add a coefficient of 3 to the gaseous hydrogen to balance out the two hydrogen in water which are being multiplied by three.
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