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## Homework Statement

Calculate the initial molarity of S

_{2}O

_{3}

^{2-}in each trial given that each trial has 1.00 mL of .010 M Na

_{2}S

_{2}O

_{3}and a total volume of 7.00 mL.

## Homework Equations

mol = g/(g/mol)

M1V1=M2V2

## The Attempt at a Solution

(1)(.01)=7x

.0014=x