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## Homework Statement

33.39 mL of the I2 solution from above is required to titrate a sample containing As2O3. Calculate the mass of As2O3 (197.8 g/mol) in the sample.

As2O3 + 5(H2O) + 2I2 → 2(H3AsO4) + 4HI

## Homework Equations

## The Attempt at a Solution

MolarMass_I2=254 g/mol

MolarMass_As2O3=197.8 g/mol

1 mol As2O3:2mol I2

I know I would have to get the mol of both I2 and As2O3 somehow in order to plug them into that relationship above.

I think Molarity may possibly be involved.

The problem is that while I know that there is 0.03339 L of I2, I don't know the concentration of I2 so i don't know how I can arrive at the number of mol of I2.

## Homework Statement

How many sigma bonds? pi bonds?

## The Attempt at a Solution

There are 6 sigma bonds since there are a total 6 of bonds between 6 atoms since all atoms have electrons in the s orbital.

There are 4 pi bonds between N and C, C and C, C and C, C and C. This is because each atom has electrons in orbital 2p.

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