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1) A sample of sodium carbonate occupies 35.5 liters at STP. How many molecules is this? 2) What is the mass of the sample sodium carbonate in Problem 2?
Part 1 ==>moles of Na2CO3 at S.T.P => 35.5/22.4 = > 1.584 moles.molecules => 1.584 x 6.023 x 10^23 = > 9.54 x 10^23 molecules. Part 2 ==>mass = moles x 106 = > 1.584 x 106 = > 168 gm (approx.)
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