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The percentage abundance of Neon gas in ...

The percentage abundance of Neon gas in air by volume is `1.8 xx 10^(-x)` and by weight is `1.0 xx 10^(-y)`. Than x - y = ________

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The correct Answer is:
0
`X - Y = 0 Ne to Y to 1.5 xx 10^(-3), W to 110^(-3)`
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