Chemistry: The Central Science (13th Edition)

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

Chapter 10 - Gases - Exercises: 10.51b

Answer

80.15 g/mol

Work Step by Step

We have the equation M = dRT/P were d is the density and M is the molar mass. We have that 2.50g occupies 0.875L so we divide the two to find the density in g/L is 2.857 g/L Then we convert the 35C to Kelvin by adding 273, 308K. Then we convert the 685 torr to atm: 685 torr * (1atm/760 torr) = 0.901 atm Now we have M = (2.857 g/L * 0.0821 * 308K) / 0.901atm = 80.15 g/mol
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.