   Chapter 25.8, Problem 2.3ACP

Chapter
Section
Textbook Problem

What amount of NaTcO4 is there in 1.0 μg of the salt? What mass of Tc?

Interpretation Introduction

Interpretation:

The amount of NaTcO4in1.0μg of salt and the mass of Tc in it has to be determined.

Concept introduction:

•                   Numberofmole=GivenmassofthesubstanceMolarmass
• 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).
• Massofthesubstance=Amountofthesubstance×Molarmass
Explanation

Using the following equation amount of NaTcO4 can be calculated,

Amount of NaTcO4=GivenmassofNaTcO4MolarmassofNaTcO4

Given mass of salt is 1.0μg=1.0×106g

Molar mass of NaTcO4 is 184.9g/mol

Amount ofNaTcO4=1.0×106g184

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