How many moles Li2CO3 do you have? That's M x L = 0.600 x 0.0300 = ?
There are two times that number of mols of Li^+ ions = ?
Then there are 6.02E23 ions in a mole of ions. mols Li^+ ions x 6.02E23 =?
How many lithium ions are present in 30.0 mL of 0.600 M Li2CO3 solution?
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