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  3. Chemistry
  4. The molecular weight of O2 and SO2 are 32 and 64 respectively. At 15°C and 150 mmHg pressure, 1L of O2 contains -N - molecules. The number of molecules in 2L of SO2 under the same conditions of temperature and pressure will be

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Q. The molecular weight of $O_2$ and $SO_2$ are 32 and 64 respectively. At $15^{\circ}C$ and 150 mmHg pressure, 1L of $O_2$ contains -N - molecules. The number of molecules in 2L of $SO_2$ under the same conditions of temperature and pressure will be

AIPMTAIPMT 1990Some Basic Concepts of Chemistry

Solution:

According to Avogadro's law "equal volumes of all gases contain equal number of molecules under similar conditions of temperature and pressure.
Thus, if 1 L of one gas contains N molecules, 2 L of any gas under similar conditions will contain 2 N molecules.