Final answer:
The statement about sodium carbonate containing two moles of sodium ions for every mole is true, as its formula Na2CO3 requires two sodium ions to balance the charge of one carbonate ion.
Step-by-step explanation:
The statement that sodium carbonate contains two moles of sodium ions for every one mole of sodium carbonate is true. Sodium carbonate, with the chemical formula Na2CO3, consists of two sodium ions (Na+) and one carbonate ion (CO32-). In a balanced ionic equation, the charges must cancel out to yield an electrically neutral compound, which in this case requires two positively charged sodium ions to balance the double negative charge of one carbonate ion.