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Answer:
2x gram
Explanation:
X gram can also be written as 1x gram
amount of oxygen diffuses in 15seconds=1x gram
amount of helium diffuses in 30seconds=?
let amount of helium may be X
1x gram = 15seconds
X gram= 30seconds
1x gram ×30 seconds/X gram×15 seconds
30seconds/X gram ×15 seconds
X =30/15
X =2
therefore the amount of helium diffuses in 30seconds=2x gram
Answer:
Explanation:
[tex]\frac{r1}{r2} = \sqrt \frac{M2}{M1}[/tex]
[tex]\frac{\frac{x}{15}}{\frac{V}{30}} = \sqrt \frac{4}{32}[/tex]
[tex]V = 4\sqrt{2} x[/tex]