How do you calculate the number of sodium ions, #Na^+#, in 14.2 g of sodium sulfate? [Relative atomic masses Na = 23, S = 32, O = 16]?
Use the number of moles of sodium per mole of sodium sulfate.
Sodium sulfate is
First, calculate the moles of sodium sulfate you have in a 14.2g sample.
- Find the molar mass of sodium sulfate
molar mass = atomic mass in grams
2(23) + 32 + 4(16) = 142 grams per mole
- Divide the mass of the sample by the molar mass to obtain moles
#(14.2g)/(142gmol^-1)#= 0.1 mol
Now, for every 1 mol of
Use Avogadro's number (6.022 x