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Avogadro's law states that under similar...

Avogadro's law states that under similar condition of T and P, equal number of particles. Experiments show that at one atmosphere pressure and at a temperature 273 K (i.e. at STP) one mole of any gas occupies a volume approximately 22.4 litre. Therefore number of moles of any sample of gas can be found by comparing its volume at STP with 22.4. 1 mole of any species contains `6.023xx10^(23)` particles which is denoted by symbol `N_(A)`. Number of atoms present in 1 gm-atom of an element or number of molecules present in 1 gm-molecule of any substance is equal to `N_(A)`. Hence it is number of particles present in one mole of the substance.
The number of gm atoms of oxygen present in 0.2 mole of `H_(2)S_(2)O_(8)` is.

A

`0.2`

B

8

C

`1.6`

D

`0.8`

Text Solution

Verified by Experts

The correct Answer is:
C
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Avogadro's law states that under similar condition of T and P, equal number of particles. Experiments show that at one atmosphere pressure and at a temperature 273 K (i.e. at STP) one mole of any gas occupies a volume approximately 22.4 litre. Therefore number of moles of any sample of gas can be found by comparing its volume at STP with 22.4. 1 mole of any species contains 6.023xx10^(23) particles which is denoted by symbol N_(A) . Number of atoms present in 1 gm-atom of an element or number of molecules present in 1 gm-molecule of any substance is equal to N_(A) . Hence it is number of particles present in one mole of the substance. At STP 11.2 L of CO_(2) contains.

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