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To convert moles of Na2CO3 to grams, you need to use its molar mass. The molar mass of Na2CO3 is approximately 105.99 g/mol (calculated by adding the atomic masses of each element: 2(22.99) + 12.01 + 3(16.00)).
Here's the calculation:
0.5 moles Na2CO3
(105.99 g Na2CO3 / 1 mol Na2CO3) = 53.00 g Na2CO3
Therefore, 0.5 moles of Na2CO3 is equivalent to 53.00 grams.