   Chapter 2, Problem 140GQ

Chapter
Section
Textbook Problem

Stibnite, Sb2S3, is a dark gray mineral from which antimony metal is obtained. What is the mass percent of antimony in the sulfide? If you have 1.00 kg of an ore that contains 10.6% antimony, what mass of Sb2S3 (in grams) is in the ore?

Interpretation Introduction

Interpretation: The mass percent of antimony in Sb2S3 and the mass of Sb2S3 in the ore if 1kg of an ore which contain 10.6% antimony.

Concept introduction:

• The molar mass of an element or compound is the mass in grams of 1 mole of that substance, and it is expressed in the unit of grams per mol (g/mol)
• Mass percentage is one way to represent the concentration of an element in a compound or a component in a mixture. Mass percent of elements of a compound is the ratio of mass of element to the mass of whole compound and multiplied with hundred.
• Moles: One mole is equivalent to the mass of the substance consists same number of units equal to the atoms present in 12g of 12C.
• From given mass of substance moles could be calculated by using the following formula,

Molesofsubstance GivenmassofsubstanceMolecularmass

Explanation

Mass percent of elements of a compound is the ratio of mass of element to the mass of whole compound and multiplied with hundred.

The molar mass given compound stibnite Sb2S3 is 339.7g/mol

The mass percent of antimony in Sb2S3 can be calculated as follows,

MolarMassofSbinthecompound =2×121.76=243.52g/molMasspercentofSbinSb2S3=MolarmassofSbMolarmassofSb2S3×100=243

Still sussing out bartleby?

Check out a sample textbook solution.

See a sample solution

The Solution to Your Study Problems

Bartleby provides explanations to thousands of textbook problems written by our experts, many with advanced degrees!

Get Started

Find more solutions based on key concepts 