#### Answer

Hydrogen gas (H2)

#### Work Step by Step

Densities of H, O and Ar at STP are 0.9, 1.43 and 1.7 g/L respectively. Since we know that density is inversely proportional to volume, Hydrogen gas has greatest volume as it has lowest density.

Chegg costs money, GradeSaver solutions are free!

Published by
Pearson

ISBN 10:
0134112830

ISBN 13:
978-0-13411-283-1

Hydrogen gas (H2)

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

Update this answerAfter 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.