what is the number of moles in 500L of He gas at STP?

Its multiple choice question:

a. 0.05 moles

b. 0.2 moles

c.20 moles

d. 90 moles

I dont get this please give a method and procedure as well

1 Answer

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  • NC4TC
    Lv 6
    8 years ago
    Best Answer

    At STP a mole of any gas occupies 22.4 L. So 500L/22.4L/m =22.32m, however 500 has only 1 sig fig so 20 moles is the correct answer

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