August 2019 NY Regents Chemistry Exam
40 The volumes of four samples of gaseous compounds at 298 K and 101.3 kPa are shown in the table below.
Which two samples contain the same number of molecules?
(1) 1 and 2
(2) 1 and 3
(3) 2 and 3
(4) 2 and 4
Solution: Gases with the same pressure, temperature and volume have the same number of molecules.
Answer:2
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