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

Question

anonymous · Answer

Can you convert 99.6mg to grams?

whpalmer4 · Answer

Find the number of moles you have of the Na2SO3 by dividing mass (in grams!) by molar mass. Multiply that quantity by number of Na atoms per molecule. Finally, multiply by Avogadro number ($6.022*10^{23}\text{ atoms/mole}$) to get number of ions.

jebonna · Answer

I agree with whats said above. In steps its basically this:

1. Convert mg to grams by dividing your amount by 1000 (to use the equations needed to convert mass to moles, the unit has to be grams)
2. Calculate no. of moles by doing mass in grams/molar mass of Na2SO3
3. Use no. of moles to find no. of molecules in the compound by doing moles x Avogadro's number

Then you will have your answer :)