The volumes of gases A, B, C and D are in this ratio 1 : 2 : 2 : 4 under the same conditions of temperature and pressure.If the volume of A is actually 5.6 dm3 at STP, calculate the number of molecules in the actual volume of D at STP (Avogadro's number is 6 x 10 23). The volume of D is four times the volume of A as given.

The volume of D will be 4 x 5.6 dm3 at STP = 22.4 dm3 at STP
The number of molecules in the volume (22.4 dm3) of D at STP = 6 x 1023.

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