1.

The molar masses of oxygen and sulphur dioxide are 32 and 64 respectively. If 1 L of oxygen at 25^@Cand 750 mm Hg pressure contains N molecules, then the number of molecules in 2 L sulphur dioxide under the same conditions oftemperature and pressure is :

Answer»

N/2
3N/2
2N
6N

Solution :According to avogardo hypothesis , equal VOLUMES of all gases undersimilar CONDITIONS of temperature and pressure contain equal number of molecules . Therefore ,if 1L of `O_2` (or`SO_2` ) CONTAINS N molecules at `25^@C` and 750 mm HG pressure , then 2L of `O_2` (or `SO_2` ) contain 2N molecules at same conditions of temperatureand pressure .


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