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13 October, 06:43

Suppose that you massed out 3.50 g of sodium carbonate, Na2CO3. How many moles would you have?

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  1. 13 October, 10:06
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    Answer: 0.0330 moles Na2CO3

    Explanation: You divide 3.50 grams by the molar mass of Na2CO3, which is 105.99 g/mol. The grams will cancel out and you're left with 0.0330 moles NA2CO3. The answer will have 3 sig figs.
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