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A particular element X can be found in t...

A particular element X can be found in three gaseous forms-mono-atomic, di-atomic and tri-atomic.If density of one of its forms at a pressure of 8.21 atm at 400 K is 18gm/L, then what would be atomic mass of the element ?

A

72

B

24

C

36

D

144

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The correct Answer is:
A, B, C
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