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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?

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?

Grade:9

1 Answers

Vikas TU
14149 Points
7 years ago
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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