Which gas has the lowest density?

[Smooth Operater]

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4 indentical 1 L flasks contain the following gases each at 0 celsius and 1 atm of pressure. Which gas has the lowest density?

a. He
b. Cl2
c. CH4
d. C3H6
e. all gases above have the same density

I though d = P(MM)/RT and therefore, the smaller molecular weight which is He is the answer, but my answer book said it's Cl2. Am I right? thanks!

 

[Manyak222]

I think they meant Hg

 

[lifeisgood]

4 indentical 1 L flasks contain the following gases each at 0 celsius and 1 atm of pressure. Which gas has the lowest density?

a. He
b. Cl2
c. CH4
d. C3H6
e. all gases above have the same density

I though d = P(MM)/RT and therefore, the smaller molecular weight which is He is the answer, but my answer book said it's Cl2. Am I right? thanks!

Yes u r right b/c Cl2 would have the highest density