Question

according to Avogadro's law ,.899g of 1dm3 h2 and 1.4384g of 1 dm3 o2 have number of molecules is same?

Answer 1

Yes both will have same number of molecules.

Avogadro's law states that at a given temperature and pressure equal volumes of gases will have equal number of moles of gases.

Answer 2

According to Avogadro's law  $899g$ of $1d{{m}^{3}}{{H}_{2}}$  and $1.438g$  of $1d{{m}^{3}}{{O}_{2}}$    have same number of molecules.

Explanation:

•Avogadro's law states that equal volume of all gases underneath similar conditions of temperature and pressure have equal range of molecules in it.

•Given that  $899g$ of $1d{{m}^{3}}{{H}_{2}}$  and $1.438g$  of $1d{{m}^{3}}{{O}_{2}}$  

•This means that the given volume of two gases  is same which is  .

•So the number of molecules present in these gases will also be same according to Avogadro's law eventhough the atoms are different.

•Also one mole of a substance contains avogadro number of particles in it.