Answered: 1) A laboratory test of 14.3 grams of…

Introduction to Chemical Engineering Thermodynamics

8th Edition

ISBN:9781259696527

Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart

Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart

Chapter1: Introduction

Section: Chapter Questions

Problem 1.1P

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1) A laboratory test of 14.3 grams of iron ore yields 8.20 grams of iron. If the iron compound in the ore is Fe₃O₄ and it is converted to pure metal by the reaction

Fe₃O₄(s) + 2 C(s) 3 Fe(s) + 2 CO₂(g),

what is the percentage of Fe₃O₄ in the ore?

2) A student was given a 3.708-g sample of a mixture of potassium nitrate and potassium bromide and was asked to find the percentage of each compound in the mixture. He dissolved the sample and added a solution that contained an excess of silver nitrate, AgNO₃. The silver ion precipitated all of the bromide ion in the mixture as AgBr. It was filtered, dried, and weighed. Its mass was 2.957 g.

What was the percentage of each compound in the mixture?

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