Chemistry: The Central Science (13th Edition)

Published by Prentice Hall
ISBN 10: 0321910419
ISBN 13: 978-0-32191-041-7

Chapter 10 - Gases - Exercises - Page 435: 10.38a


8.80 x 10^19 molecules

Work Step by Step

We are given the pressure, the temperature, and the volume of 1L. Therefore, we can use the ideal gas law: PV = nRT to find the number of moles, which is n = PV/RT = (3.00 x 10^-3atm) * (1L) / (0.0821 * 250K) = 1.46 x 10^-4 moles Then since we have moles, we can find the number of molecules by multiplying by Avogadro's number, 6.022 x 10^23, this gives: 8.80 x 10^19 molecules
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