Answer
1.2 x 10 ^ 24 molecule H2
Work Step by Step
The volume of one mole of gas at STP is 22.4 L. Use this as a conversion factor. Also use Avogadro's number to determine the number of molecules.
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.