Problem: How many SO32- ions are contained in 99.6 mg of Na2SO3? The molar mass of Na2SO3 is 126.05 g/mol.

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For this problem, we’re being asked to determine the number of  SO32- ions found in 99.6 mg of Na2SO3

The flow for this problem will be like this:

mg of Na2SO3 (conversion)→ g of Na2SO3 (molar mass of Na2SO3)  Moles of Na2SO3 (mole-to-mole comparison)  Moles of  SO32-  (Avogadro’s number)  Ions of  SO32- 


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Problem Details

How many SO32- ions are contained in 99.6 mg of Na2SO3? The molar mass of Na2SO3 is 126.05 g/mol.

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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Mole Concept concept. You can view video lessons to learn Mole Concept. Or if you need more Mole Concept practice, you can also practice Mole Concept practice problems.