## Chemistry and Chemical Reactivity (9th Edition)

Published by Cengage Learning

# Chapter 3 Chemical Reactions - Study Questions - Page 137a: 4

#### Answer

a) $2Cr + 3Cl_{2} → 2CrCl_{3}$ b) $SiO_{2} + 2C → Si + 2CO$ c) $3Fe + 4H_{2}O → Fe_{3}O_{4} + 4H_{2}$

#### Work Step by Step

a) $2Cr + 3Cl_{2} → 2CrCl_{3}$ two moles of chromium reacts with three moles of chlorine to form two moles of chromium chloride. b) $SiO_{2} + 2C → Si + 2CO$ one mole of silica reacts with two moles of carbon to free the silicon and oxidize the carbon as carbon monoxide. c) $3Fe + 4H_{2}O → Fe_{3}O_{4} + 4H_{2}$ three moles of iron in pure state oxidizes with four moles of water to form one mole of ferric oxide and four moles of hydrogen.

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.