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The volumes of gases A, B, C and D are i...

The volumes of gases A, B, C and D are in the ratio, 1:2:2:4 under the same conditions of temperature and pressure.
If the volume of A is actually 5.6 dm at STP, calculate the number of molecules in the actual volume of D at STP (Avogadro's number is `6xx10^(23))`

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`6xx10^(23)`
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