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WARRIOR [948]
4 years ago
9

PLEASE AND THANK YOU

Chemistry
1 answer:
Novay_Z [31]4 years ago
3 0

Answer:

CH_{4}

Explanation:

We know from laws of diffusion that rate\alpha\sqrt{\frac{T}{m} }.

In the given question , it is said that temperature is same in both the cases .

So for rate to become half , molecular mass must be 4 times,<em>ie,</em>

Mass of required gas = 4×mass of He=4×4=16.

Therefore the gas is CH_{4}

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