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1) A 85.0g sample of phosphoric acid is in a container at STP. What volume is the container? 2) How many molecules of phosphoric acid are in the container in Problem 1?

1) A 85.0g sample of phosphoric acid is in a container at STP. What volume is the container?
2) How many molecules of phosphoric acid are in the container in Problem 1?

Grade:9

1 Answers

Vikas TU
14149 Points
7 years ago
Part 1 =>
moles = > 85/98 = > 0.867 moles.
Volume at STP => moles x 22.4 = > 0.867 x 22.4 = > 19.42 litre.
 
Part 2 =>
No. of molecules = > 0.867 * 6.023 * 10^23 = > 5.22 x 10^23 molecules.

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