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A mixture of hydrogen and oxygen has vol...

A mixture of hydrogen and oxygen has volume `500cm^(3)` , temperature 300 K, pressure 400 kPa and mass `0.76g` .The ratio of mases of oxygen to hydrogen will be :

A

`3 : 16`

B

`3 : 8`

C

`16 : 3`

D

`8 : 3`

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